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Best Used Samsung Galaxy S23 Ultra Deals Today

AI-curated top picks from hundreds of eBay listings. Updated daily with verified sellers and transparent pricing.

Top Picks Today

Updated: Apr 20, 2026

Product Image Samsung Galaxy S23 Ultra SM-S918U1 512GB FACTORY UNLOCKED CDMA + GSM - EXCELLENT
#1

Samsung Galaxy S23 Ultra SM-S918U1 512GB FACTORY UNLOCKED CDMA + GSM - EXCELLENT

Excellent - Refurbished

$472.48
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Why we picked it #1

This is the top pick because you’re getting the Galaxy S23 Ultra in nearly-new (excellent) refurbished condition, with a generous 512GB of storage—perfect if you like keeping tons of photos, apps, or large files on your phone. What really sets this listing apart, though, is peace of mind: you still get an entire year of manufacturer’s warranty (rare for a phone this age), and the seller has a stellar track record, with super-high positive feedback and a “Top Rated” badge. You can buy confidently, knowing returns are accepted for 30 days if anything seems off, and the seller pays the return shipping. Plus, you get a genuine Samsung charger, and nice touches like a free screen protector and same-day shipping if you order by noon. The main trade-off compared to the next-best value is the price: you’ll pay a bit more than for a 256GB unit in similarly excellent condition (Listing #2). But with twice the storage, a full accessories kit, and the security of warranty coverage, you’re basically investing in a hassle-free experience and future-proofing your device. If maximum storage and minimal risk matter to you, this is easily the most well-rounded option here.

Product Image Samsung Galaxy S23 Ultra 256GB SM-S918U1 Factory Unlocked - Excellent
#2

Samsung Galaxy S23 Ultra 256GB SM-S918U1 Factory Unlocked - Excellent

Excellent - Refurbished

$414.48
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Why we picked it #2

This listing brings you a Galaxy S23 Ultra that’s also in excellent refurbished condition, but at a notably lower price than the 512GB top pick. That gives you strong value for money if you’re okay with 256GB of storage—which is still generous for almost anyone unless you absolutely load up on 4K videos and massive apps. You’re buying from a very established, top-rated seller with an excellent reputation and a full 1-year manufacturer’s warranty, which is hard to beat for a used flagship. Returns are easy, and you get a real Samsung charger, the original box, screen protector, and fast shipping—so you’re not left chasing down missing accessories. The phone is also certified refurbished, adding an extra layer of confidence in the quality. Compared to the #1 listing, you save a decent chunk of money but get only half the storage. For most people, that’s a very fair trade—especially if your photos and videos live in the cloud or you use streaming services rather than local downloads. Unless 512GB is a must for you, this is a sweet spot for warranty, trust, and price without any real compromise on the core S23 Ultra experience.

Product Image Samsung Galaxy S23 Ultra SM-S918U 512GB Unlocked Very Good Condition
#3

Samsung Galaxy S23 Ultra SM-S918U 512GB Unlocked Very Good Condition

Very Good - Refurbished

$418.52
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Why we picked it #3

Here, you’re getting the S23 Ultra with a roomy 512GB of storage for a bargain price, which is a smart move if you need lots of space for media or big apps. The condition is “very good” instead of “excellent,” which means you might notice some light, but not major, signs of prior use—still respectable for a flagship at this price point. Importantly, the seller is very reputable, and accepts returns for 30 days if you’re not happy. You don’t get the original box or a full charger (just a cable and SIM ejector), and there’s no mention of a remaining manufacturer’s warranty—so you’re skipping some of the peace of mind you'd get with the top two listings. Instead, you get reliability checks like ISO9001 certification and at least 80% battery health, so you’re not rolling the dice totally blind. If price-to-storage is your main goal and you’re comfortable with a little more wear and fewer accessories, this option beats out others in this price range in terms of value. Just keep in mind: for a bit more, options 1 and 2 give you a full warranty and “excellent” condition—so the choice comes down to your personal comfort with minor tradeoffs to save some cash.

Product Image Samsung Galaxy S23 Ultra 512GB Factory Unlocked Android Green SM-S918UZGFXAA
#4

Samsung Galaxy S23 Ultra 512GB Factory Unlocked Android Green SM-S918UZGFXAA

Excellent - Refurbished

$469.99
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Why we picked it #4

This option gives you the S23 Ultra in excellent refurbished condition and a hefty 512GB of storage, so you’re set whether your needs are big photos, games, or tons of apps. What makes it stand out (besides the generous storage and solid condition) is the full year of seller warranty—if anything major crops up, you’ve got your back covered long after most other listings’ return windows close. The seller is highly rated and offers a straightforward return process, plus the phone is factory unlocked, ready for whatever carrier you choose. It’s a little pricier than the lowest-cost 512GB listing (Listing #3), but you get better condition and that unbeatable one-year warranty, which is hugely reassuring in the used phone world. The main thing you’re missing here versus the top pick is the manufacturer’s warranty and a few accessories (like a charger or screen protector)—here, you may need to grab a few basics separately. If you want “excellent” cosmetic shape, loads of storage, and serious after-sale safety at a reasonable price, this is a compelling choice. It lands just behind the very top picks because you’re not getting the full accessory and warranty kit, but it’s a solid all-in-one alternative.

Product Image Samsung Galaxy S23 Ultra 5G SM-S918U GSM/CDMA FACTORY UNLOCKED
#5

Samsung Galaxy S23 Ultra 5G SM-S918U GSM/CDMA FACTORY UNLOCKED "Very Good"

Very Good - Refurbished

$389.88
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Why we picked it #5

This listing is where price really starts working in your favor—the S23 Ultra here comes in at one of the lowest costs among the top options, saving you a serious chunk compared to listings with similar storage. You’re still getting a strong seller, a 1-year warranty, and a 30-day return window, which isn’t always a given in this price bracket. It’s also factory unlocked and includes some key accessories (travel adapter and USB-C cable), so you’re up and running right away. The tradeoff is a step down in condition—this is marked as “very good” with moderate wear, so expect more visible signs of use than with the “excellent” options above. Also, you get 256GB of storage instead of 512GB, so while that’s plenty for most people, it’s a factor if you’re a digital hoarder. But if you’re okay with minor scuffs and cosmetics, you’re getting almost all the real-world function of the top listings for way less. In short: prioritize value and don’t mind a few marks, and you’re landing a flagship with warranty peace of mind at a wallet-friendly price. If perfect looks matter, spend up; otherwise, this is an excellent all-rounder for less.

Product Image Samsung Galaxy S23 Ultra 5G 256/512/1TB Verizon T-Mobile AT&T Unlocked
#6

Samsung Galaxy S23 Ultra 5G 256/512/1TB Verizon T-Mobile AT&T Unlocked

Used

$359.26
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Why we picked it #6

If you want the absolute lowest price on this list, this used Galaxy S23 Ultra is where it happens—perfect if your aim is to spend as little as possible for a still-powerful flagship. The unlocked device is backed by a highly rated, top seller with easy 30-day returns (seller pays shipping), so you’re not left without support if there’s a problem at the start. The catch? This unit is actually used (not refurbished) and described as having moderate cosmetic wear—expect to see clear signs of use. Accessories are minimal: just a USB-C to USB-C cable (no power adapter), and you won’t get the original box. There’s also no mention of any seller or manufacturer warranty, so after the return window closes, you’re on your own. Compared to the higher-ranked picks, you’re trading all the extra polish and long-term protection for upfront savings. If that seems worth it—and you don’t mind a few scuffs or sourcing your own charging brick—this may be the best value for pure price. Just know you’re giving up some of the safeguards and shine of the “refurbished” listings.

Product Image Samsung Galaxy S23 Ultra 256GB S918U Unlocked - Good
#7

Samsung Galaxy S23 Ultra 256GB S918U Unlocked - Good

Good - Refurbished

$381.99
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Why we picked it #7

This S23 Ultra comes in at a lower price than most higher-ranked listings, so if you want a flagship on a bit more of a budget, it’s worth a look. You get an unlocked phone with 256GB of storage—ample for most people (unless you’re storing lots of large files)—and solid seller trust, with a top-rated badge and high buyer satisfaction. The 30-day return policy (with return shipping covered by the seller) means you can buy with a safety net. However, this phone is rated “good - refurbished” with moderate wear, so don’t expect it to look pristine in hand. The charger included is third-party, not original Samsung, and there’s no box or special extras. Overall, compared with the “excellent” or even “very good” refurbished picks (especially the #2 and #5 options), you’re trading condition for price. Warranty length isn’t specified, so for long-term reassurance you may want to look elsewhere. If you mainly care about saving money and don’t mind a few cosmetic imperfections, you’re getting solid hardware and an easy buying experience. Just know it’s not the shine-and-polish deal the pricier listings provide.

Product Image Samsung Galaxy S23 Ultra Factory Unlocked 256GB Graphite SM-S918UZAAXAA Android
#8

Samsung Galaxy S23 Ultra Factory Unlocked 256GB Graphite SM-S918UZAAXAA Android

Good - Refurbished

$397.99
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Why we picked it #8

Here you’re getting a refurbished S23 Ultra from a trusted, top-rated seller, with the reassurance of a full-year warranty and a fair price. This listing is for the 256GB model in good condition—which means you should expect some moderate signs of wear, but nothing that impacts performance. You get a stylus and USB-C cable included (so the essentials are covered), but everything arrives in new generic packaging, not the original box. Compared to higher-ranked listings like #4 and #5, you’re saving a bit by giving up “excellent” condition and some extras—there’s no original charger, and the packaging isn’t original either. For day-to-day use, though, you’re still getting the flagship experience (S Pen, powerful camera, fast processor), and you have the big advantage of that 1-year warranty for peace of mind. If you’re fine with a phone that isn’t super pristine and you want a good balance of price, features, and after-sale support, this is a reasonable pick. Go for one of the top listings if you want the shiniest device, but if a few scrapes don’t bother you, this covers the bases for less.

Product Image Samsung Galaxy S23 Ultra 5G 256/512/1TB Unlocked T-Mobile AT&T Verizon Good
#9

Samsung Galaxy S23 Ultra 5G 256/512/1TB Unlocked T-Mobile AT&T Verizon Good

Good - Refurbished

$378.16
View on eBay

Why we picked it #9

This option is all about aggressive pricing: you’re getting a refurb S23 Ultra for less than most competitors, and it’s unlocked so you’re not tied to any one carrier. The 30-day return window and highly rated seller make it a low-risk buy in the short term, plus you get a third-party charger to get started. The main compromises? Condition here is "good - refurbished" with moderate wear—this likely means marks, nicks, or maybe minor scratches. Storage isn’t specified, so if you care about having 256GB or more, you may want to confirm before you buy. You’re missing some of the longer-term peace of mind found on higher-ranked listings; there’s no warranty mentioned after the return window. If cost is king for you and you’re willing to accept heavier signs of use, this deal stands out for pure savings. But if you want a flawless look, longer warranty, or full original accessories, look to options higher up the list—you’ll pay a bit more, but gain extra reassurance and polish.

Product Image Samsung Galaxy S23 Ultra 256GB Unlocked SM-S918U1, 1-Yr Warranty – Very Good
#10

Samsung Galaxy S23 Ultra 256GB Unlocked SM-S918U1, 1-Yr Warranty – Very Good

Very Good - Refurbished

$429.95
View on eBay

Why we picked it #10

This listing gets you a "very good" refurbished Galaxy S23 Ultra with 256GB of storage, backed by a full year seller warranty—a real standout if you want decent price protection after you buy. The seller is top-rated and the phone has passed network compatibility checks on major carriers, so switching to your own plan should be smooth. You’ll also get an original box and charging cable, making the unboxing a little more complete than some other lower-cost picks. Where it falls behind the very top spots: the device will show moderate signs of prior use, not just light wear. For a similar price, some higher-ranked listings (#2 and #4) offer "excellent" cosmetic condition, while the storage and warranty are competitive but not class-leading (some others offer double the storage, or a manufacturer’s warranty). If you’re looking for a solid mid-range compromise—willing to live with a few cosmetic scuffs in exchange for strong after-sale support—this is a safe and sensible buy. Just know a stretch into the "excellent" options above gets you a phone that’s a bit more pristine for your dollars.

Our AI Expert Finds the Best Samsung Galaxy S23 Ultra Deals, Every Day

Every day, our AI analyzes hundreds of Samsung Galaxy S23 Ultra listings across major resellers to surface the truly best deals — not just the cheapest.

What Makes Our AI-Powered Rankings Different

Most deal sites sort by price and call it a day. We go deeper. Our AI evaluates every listing across multiple dimensions:

💰 Smart Value Analysis

We compare specs, condition, and features against the asking price — not just looking for cheap, but for worth it.

✅ Condition Intelligence

Refurb grade, cosmetic notes, battery health, included accessories — we read between the lines so you know exactly what you're getting.

🛡️ Seller Trust Score

Feedback ratings, return policies, warranty coverage — we favor sellers with a proven track record of keeping buyers happy.

⚠️ Risk Detection

Missing details, vague descriptions, or red flags? Our AI catches what's not said and adjusts the ranking accordingly.

Fair, Transparent, and Updated Daily

Every listing gets the same rigorous analysis. Our scoring system weighs dozens of real-world signals — from price-to-spec ratios to seller reputation — to produce a single, transparent ranking.

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Samsung Galaxy S23 Ultra

Samsung Galaxy S23 Ultra: Why Buy Used?

The Galaxy S23 Ultra is Samsung's 2023 flagship with S Pen -- a capable smartphone with the Snapdragon 8 Gen 2 processor, a 6.8" QHD+ Dynamic AMOLED 2X 120Hz display, and a 200MP+12MP+10MP+10MP camera system. Now two generations old, it represents outstanding value on the used market with substantial savings over newer models.

What Makes the Galaxy S23 Ultra a Great Choice

Every Galaxy S23 Ultra has the same core hardware -- the only thing that varies between units is storage capacity. That makes buying used straightforward: you're getting the same phone regardless of who owned it before.

  • Snapdragon 8 Gen 2 processor -- Samsung's 2023 flagship chipset delivers top-tier performance for gaming, photography, multitasking, and everyday use.
  • 200MP+12MP+10MP+10MP camera system -- 200MP main, 12MP ultra-wide, 10MP 3x telephoto, 10MP 10x telephoto. Capable of detailed photos and 4K video recording in virtually any condition.
  • 6.8" QHD+ Dynamic AMOLED 2X 120Hz display -- Dynamic AMOLED 2X panel with vivid colors, deep blacks, and smooth 120Hz scrolling. Excellent for media, gaming, and outdoor visibility.
  • S Pen included -- Built-in S Pen stylus for notes, sketches, and remote control of the camera. A signature Samsung productivity feature.
  • 8/12GB RAM -- Plenty of memory for smooth multitasking and app switching.
  • 256GB, 512GB or 1TB storage -- Choose the capacity that fits your needs. Larger options command a premium on the used market.
  • 5000mAh battery -- Large battery with fast wired charging and Qi wireless charging.
  • Android 13 + One UI 5.1 -- 4 years of OS updates + 5 years security. Samsung's long update commitment means this phone will receive software support for years to come.
  • IP68 water resistance -- Dust and water resistant (up to 1.5 meters for 30 minutes).
  • Samsung DeX -- Connect to a monitor for a desktop-like experience.

Who Is This Phone For?

  • Power users and productivity enthusiasts -- The Galaxy S23 Ultra with its S Pen is designed for people who demand the most from their smartphone -- top-tier camera, large screen, and maximum performance.
  • Photography enthusiasts -- The 200MP main camera and multi-lens system deliver versatile, high-quality shots in any lighting condition.
  • Budget-conscious buyers who want premium -- Buying used means flagship Ultra features at a fraction of the new price. As a two-generation-old model, used prices are especially attractive.
  • Upgraders from older Samsung phones -- If you're coming from an S21 or older, the jump in display quality, camera capability, and processing power is dramatic.

Smart Tips for Buying Used

  • Check Google FRP lock -- A phone with Factory Reset Protection still tied to someone else's Google account is unusable. Make sure the seller confirms FRP is cleared.
  • Verify Samsung Knox status -- Knox 0x1 means the phone was rooted or modified at some point. This permanently voids Samsung warranty and disables Samsung Pay, Samsung Health, and some enterprise features. Knox 0x0 is what you want.
  • Check IMEI status -- Should be clean (not blacklisted or reported lost/stolen). You can check this for free at imeipro.info or similar services.
  • Screen burn-in -- AMOLED displays can develop burn-in over time, especially around the navigation bar and status bar areas. Ask the seller about any ghosting or permanent marks on the display.
  • Battery health -- Samsung doesn't show battery health percentage as easily as iPhones. Check Samsung Members app data if the seller can provide it, or look at battery cycle count. On a two-generation-old device, some battery degradation is normal.
  • Network lock -- Unlocked phones work on any carrier and command a premium. Carrier-locked phones are cheaper but restricted to one network.
  • Look for returns and warranty -- 30-day returns at minimum. Some professional sellers offer 90-day or 1-year warranties. All units are past Samsung's original warranty -- seller warranty matters more.
  • Trust the AI rankings -- Our system analyzes price, condition, seller trust, and return policies to surface the best deals. The top picks represent genuine value.

Frequently Asked Questions

Is the Samsung Galaxy S23 Ultra worth buying used?

Yes. Every unit has the same Snapdragon 8 Gen 2 processor, the same camera system, and the same 6.8" QHD+ Dynamic AMOLED 2X 120Hz display -- there's no performance lottery. The only variable is storage size (256GB, 512GB or 1TB). Buying used saves significantly off the original retail price. As a two-generation-old model, used prices are especially attractive -- you get a Samsung flagship with 200MP camera and 120Hz display for a fraction of the current retail price.

How does used compare to refurbished?

  • Used: Sold by the previous owner. Condition varies -- check the listing carefully for cosmetic wear, screen burn-in, and battery health.
  • Refurbished: Professionally inspected, tested, and cleaned by a seller or authorized refurbisher. Often comes with a warranty and graded condition (Excellent, Very Good, Good).

Both can be great value. Our AI evaluates condition, seller trust, and return policies regardless of the label.

What should I check before buying a used Galaxy S23 Ultra?

  • Google FRP lock -- Make sure Factory Reset Protection is cleared. A phone still tied to someone else's Google account is unusable.
  • Samsung Knox status -- Knox 0x0 is good. Knox 0x1 means the phone was rooted/modified, which disables Samsung Pay and voids warranty.
  • IMEI status -- Should be clean (not blacklisted).
  • Screen burn-in -- Look for ghosting or permanent marks on the AMOLED display, especially around the navigation bar.
  • Battery health -- Check the Samsung Members app data if available. Some degradation is normal for a two-generation-old device.
  • Network lock -- Unlocked phones work on any carrier. Carrier-locked phones are cheaper but limited.
  • Return policy -- At least 30 days. Many top sellers offer longer.

What's the difference between the Galaxy S23 Ultra and the Galaxy S23 / S23+?

The Galaxy S23 Ultra is the top-tier model in the S23 series. Compared to the standard and Plus models, the Ultra offers: a larger 6.8" QHD+ display, a 200MP main camera (vs 50MP), an S Pen stylus, a Armor Aluminum frame, and more RAM/storage options. The standard S23 and S23+ are more affordable and lighter, but the Ultra delivers the most capable camera, the best display, and the most complete feature set.

What's the difference between 256GB vs 512GB vs 1TB?

Storage is the only hardware difference between units:

  • 256GB -- The base and most common option. Fine for most users.
  • 512GB -- Good for heavy photo/video shooters or large app libraries.
  • 1TB -- Best for power users who store lots of media locally. Least common and commands a premium.

Our AI factors storage into the value ranking, so higher-storage deals that represent good value will rank accordingly.

Why are prices so different for the same phone?

Pricing varies by storage tier (256GB vs 512GB vs 1TB), network lock status (unlocked costs more), cosmetic condition, screen burn-in presence, battery health, and seller reputation. Our AI analyzes all of these daily to surface the best-value deals.