Best Used Samsung Galaxy S21 Ultra Deals Today

If you want total confidence in what you're buying, this S21 Ultra stands out. It's factory unlocked, so it will work on all major networks, and it's listed as "Excellent - Refurbished," meaning it's been professionally restored and shows only minimal wear. Where this one really shines is peace of mind: you get a full year of manufacturer warranty, something almost nonexistent on other used Galaxy S21 Ultra options. The seller is highly reputable, offers same-day shipping if you buy early, and provides genuine Samsung charging gear. Returns are easy, and you won't pay return shipping if there's an issue. While you are paying a bit more compared to basic used listings, you're getting a near-new device that's been thoroughly tested and backed by strong support. If you're after the best value without surprises—especially if you plan to hold onto your phone for a while—this is a smart, low-risk pick with lots of backup if anything goes wrong.

If you want the lowest price and don't mind a little wear, this option saves you some real cash. You're getting a factory unlocked S21 Ultra from a top-rated, trustworthy seller, and you can return it for a full refund or replacement within 30 days if it's not what you expected. The charger included is a generic one, but it still gets you charged up. This pick is among the most affordable in the lineup, so it's perfect if you’re prioritizing value above all else. Just keep in mind that it’s a used device with moderate wear, and you won’t get a manufacturer warranty or the same refurb-level assurance as the top pick. Compared to the #1 listing, you’re giving up that "like new" experience and the peace of mind a refurb warranty gives, but you’re keeping an extra $47 in your pocket. If your main concern is value for money and you’re comfortable with a used device, this is a practical choice.

This listing is a solid middle ground if you want a gently used Galaxy S21 Ultra but feel more comfortable dealing with an individual seller rather than a refurb house. It's unlocked and works on all the major carriers, and the seller claims to be the original owner. Plus, they've taken the extra step to clean the screen and remove the protector, so you’re not getting someone’s old fingerprints. The seller has good feedback and promises quick shipping, but there’s no mention of a return policy—unlike every higher-ranked pick, where returns are easy. Pricewise, it’s more expensive than the cheapest options (#4, #5, #6) but lacks their top-tier seller backing or warranty. If buying from a down-to-earth seller appeals to you and you’re not worried about potential returns, this could be a decent bet. Otherwise, for pure value and protection, you’ll get more peace of mind with one of the top-rated sellers above.

If you're stretching your dollars as far as they'll go, this is one of the cheapest S21 Ultras—and it comes from a highly trusted, established seller. You also get a full year of seller warranty and the safety net of a 30-day return period with seller-paid return shipping. This means you're never stuck if something's wrong out of the box. But here's the tradeoff: this phone has screen burn-in (a permanent, visible mark on the display from previous use). For many, this is a dealbreaker for enjoying media or general aesthetics, so only consider it if display perfection isn’t crucial for you. Among similarly priced options, it stands out for seller reliability and warranty length, but if visual quality matters a lot, you're better off spending a bit more for a cleaner screen (see the top pick). If you’re okay with cosmetic quirks and want strong seller support, this listing offers substantial bang for your buck.

You’re looking at one of the most affordable S21 Ultra options, so it’s easy on your wallet. This phone is factory unlocked, comes from a top-rated, highly reliable seller, and you have a full 30-day return window with no hassle on return shipping. The main compromise? Like some similar listings in this price range, it has “medium burn”—that means the screen shows some visible discoloration or ghosting, a byproduct of heavy use. Functionally, everything else is fine, but visually, it won’t be pristine. You also get a third-party charger instead of a Samsung original. If you want to maximize your value and can tolerate a screen that isn’t flawless, this is a good compromise. But if you’d rather avoid screen issues for a bit more cash, the top pick will give you a much cleaner experience and more protection—just at a higher upfront cost.

This is the very cheapest unlocked S21 Ultra out of the bunch. You’ll save a few dollars compared to similar used listings, and you still get a solid return policy (30 days, seller covers shipping) through a top-rated, high-feedback seller. It runs on all major networks, so switching carriers isn’t an issue—in that sense, you’re not sacrificing compatibility for price. The catch? This phone is listed as 'fair good used' and it has ‘medium burn’ on the screen, which means some visible discoloration from past use. Also, it comes with no charger at all, and cosmetic wear will be noticeable. If you don’t mind a screen that’s less than perfect and want the absolute lowest price with good seller support, go for it. But if you’re a stickler for display quality or want a charger in the box, spending a little extra may make sense.

This listing is all about getting the max storage—512GB. If you have tons of photos, videos, or apps, this is a big plus. The phone is unlocked, so you’re not tied down to any carrier, and the device reportedly has no major flaws like burn-in or hardware issues. That said, you’re paying a noticeable premium compared to others, and unlike just about every other choice here, there’s no return option—so you’re taking on more risk. The seller is relatively new, so you don’t get the same history or confidence as the highly established top sellers. If storage is your top priority and you’re comfortable rolling the dice a bit to get it, this performs where it counts for heavy users. For most people strictly chasing value and peace of mind, you’ll do better with one of the more competitively priced, high-trust options earlier in this lineup—even if you have to accept less storage.

This one is all about maxed-out specs: you get 512GB of storage (plenty for media, apps, and photos) and the high-end 16GB RAM, which gives a performance edge for heavy multitasking. Plus, it comes with light cosmetic wear, so it should look quite good in person, and accessories are included. The phone is unlocked, so you’ll be free to use any carrier. However, you’re paying a hefty premium for the upgrade, making it the most expensive choice here by a good margin, and you only get a very short return window (14 days, and you pay shipping). The seller has perfect feedback but isn’t as established as the big names above. If you absolutely need the maximum storage and RAM—and you value a lightly used device with some accessories—this is the listing for you. But if you’re really focused on getting the best value, you could save a chunk of money by going for a more affordable 128GB model with a better return policy.

This refurbished S21 Ultra comes with the security of a full-year seller warranty, and it's from a very established, highly rated seller—so you can count on support if issues come up over time. The phone itself is "Very Good" condition, so some moderate signs of use are expected, but nothing major. It's unlocked, which means it works across all major carriers. You do get the basics (charging cable) but don’t expect the full original accessory kit. Keep in mind the price is on the higher side for what you’re getting, and the listing relies on stock photos, so you can’t see the exact device in advance—something to be mindful of if you're picky about wear. If long-term confidence is most important to you and you’re okay spending extra, this is a sound, low-hassle choice. Otherwise, the #1 pick offers a similar worry-free experience at a lower price with an even more thorough refurb process.

This option is for you if you want a refurbished S21 Ultra with more storage (256GB) and are buying from a highly reputable, top-rated seller. The phone comes in very good condition, so minimal wear is expected—and you get a 30-day return window if it doesn’t meet your expectations. They also include a genuine Samsung charger, which is a nice touch. However, you’re paying significantly more than the budget-friendly options, and it has some caveats: it may require manual APN setup to work on certain carriers, it’s missing a SIM card and ejector tool, and there’s no manufacturer warranty mentioned (just a basic seller return). If you need that extra storage and don’t mind some technical setup and minor missing accessories, this is a roomy, hassle-free choice. For most seeking maximum value, one of the less expensive, 128GB options will be kinder to your budget—especially if you don’t need the extra space.