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Used Samsung Galaxy Buying Guide: S21–S24 Compared

Samsung's Galaxy S line is the Android world's most popular premium phone series — and it produces an excellent used market. Galaxy flagships hold up well, receive extended software support (Samsung now promises 7 years of OS updates on recent S-series), and drop in price sharply after new generations launch.

In 2026, the used Samsung sweet spot sits in the S21 and S22 series, with S23 models becoming increasingly affordable. This guide compares every major S-series model from S21 to S24 so you can make the right call for your budget.

Samsung Galaxy S Series: Quick Comparison

Prices are typical used/refurbished market ranges from Swappa and Back Market as of early 2026.

Galaxy S21 Series — The Budget Pick

Keywords: used samsung galaxy s21 ultra (320/mo, LOW competition)

The S21 series launched in early 2021 and is now firmly in value territory. Samsung committed to 4 major Android updates for the S21, which means it's reaching the end of its software support window in 2026. This is the key consideration.

Should You Buy an S21 in 2026?

Yes, if:

• You need a capable phone under $250
• You understand software updates are ending
• You primarily use apps rather than needing bleeding-edge security patches

No, if:

• You want software updates through 2027+
• You use mobile banking or security-sensitive apps (running an unsupported OS creates risk)

S21 Ultra Specific Notes

The S21 Ultra is the best S21 for camera and display quality — 6.8" Dynamic AMOLED, 108MP primary camera, 100x Space Zoom. At ~$280–$350, it delivers extraordinary hardware for the price. But again: software support is ending.

Galaxy S22 Series — The Value Sweet Spot

Keywords: used samsung galaxy s22 ultra (320/mo, LOW competition), used samsung galaxy s22 (210/mo, MEDIUM)

The S22 series hits the current sweet spot for used Samsung buyers:

• Software support extends to 2028 (Android 16/17)
• Prices have come down significantly since S23/S24 launches
• Snapdragon 8 Gen 1 is genuinely capable in 2026 for everything except AI-intensive apps

S22 vs S22+ vs S22 Ultra: Which to Pick

Galaxy S22 (Base): 6.1" display, 50MP camera system, 3700 mAh battery. The smallest and most affordable. Battery life is its real weakness — heavy users will be charging twice daily. Ideal for compact-phone fans.

Galaxy S22+: Same camera system as S22 in a 6.6" body with meaningfully better battery (4500 mAh). If you want more screen and better endurance, the S22+ is the better value over the base S22.

Galaxy S22 Ultra: The outlier — more Note than S-series, with a built-in S Pen and the best camera stack. 108MP primary, 10x optical zoom, 12GB RAM. At $400–$500, it's a compelling deal for productivity-focused buyers who want a stylus.

Galaxy S23 Series — Best Balance of Value and Longevity

The S23 marks Samsung's shift to 7 years of software updates. Software support runs to 2029, and the Snapdragon 8 Gen 2 chip is genuinely excellent — better power efficiency than the S22's 8 Gen 1.

Galaxy S23 Ultra at ~$550–$700 is the most compelling used premium Android in 2026. You get:

• 200MP primary camera (astonishing detail)
• Built-in S Pen
• 5000 mAh battery
• 7 years of updates
• Snapdragon 8 Gen 2

For buyers willing to spend toward the higher end of the used market, the S23 Ultra is the pick.

Galaxy S24 — Near-New at a Discount

The S24 series only launched in early 2024 — used prices haven't fallen dramatically yet. But for buyers wanting the absolute latest features (Galaxy AI on-device, Snapdragon 8 Gen 3, 7 years of updates to 2031), the S24 at ~$580–$680 represents ~20% savings over new.

Galaxy Z Fold 5 Used: Also worth mentioning — the Z Fold 5 foldable is appearing in the used market around $700–$900, dramatically below its $1,799 launch price. Niche pick, but genuinely unique form factor. Keywords: samsung galaxy z fold 5 used (70/mo, MEDIUM)

Which Used Samsung Galaxy Should You Buy?

Best under $300: Galaxy S22 (base) or S21 Ultra Best overall value: Galaxy S22 Ultra Best for longevity: Galaxy S23 Ultra Best for near-new experience: Galaxy S24 Best compact: Galaxy S22 base

Where to Buy Used Samsung Galaxy Phones

1. Back Market — best selection of S21–S24, graded and warranted
2. Swappa — peer-to-peer with IMEI verification, good prices on S22
3. Amazon Renewed — fast Prime shipping, 30-day returns
4. Samsung Certified Re-Newed — Samsung's own refurb store (similar to Apple Certified)
5. eBay Certified Refurbished — Samsung partners for 2-year warranty devices

📌 See also: Best Places to Buy Used Phones Safely (2026) | How to Check a Used Phone Before You Buy

What to Check When Buying a Used Samsung

Beyond the standard phone checklist, Samsung-specific items to verify:

1. S Pen functionality (on Ultra and Note models) — test all gestures
2. Fingerprint sensor (under-display optical) — can degrade with screen protectors
3. Exynos vs Snapdragon model — Exynos variants (sold in some regions) run hotter and have weaker GPU. For US buyers, Snapdragon is standard, but confirm if buying internationally
4. Region lock — Samsung phones sold internationally can have region restrictions
5. DeX support — verify if the feature matters to you

FAQ: Used Samsung Galaxy

Q: Is the Samsung Galaxy S21 still worth buying in 2026? For very tight budgets, yes — but with open eyes. Software updates are ending in 2026. The hardware is still capable, but you'll be running an increasingly outdated OS which carries security implications. For $50 more, an S22 gets you two more years of support.

Q: How long do Samsung Galaxy phones last? S21 and earlier: 4 years of updates. S22+: Samsung committed to 4 years of OS + 5 years security. S23 and newer: 7 years of OS updates. Hardware-wise, Samsung phones typically run well for 4–6 years with basic care.

Q: What's the difference between Galaxy S22 and S22 Ultra? The S22 Ultra is essentially a Note phone with the S series branding. It has a built-in S Pen, a larger 6.8" display, superior camera system (108MP vs 50MP primary, better zoom), and significantly more RAM. It's $150–$200 more used but a meaningfully different device.

Q: Should I buy Exynos or Snapdragon Galaxy? Snapdragon, where possible. US models always ship with Snapdragon. European/international models may have Exynos, which historically has run hotter and delivered weaker GPU performance. Check your listing's region before buying.

Related Guides:

• Best Budget Android Phones Under $300
• How to Check a Used Phone Before You Buy
• Best Places to Buy Used Phones Safely (2026)
• Used Google Pixel Phones: Best Models for Stock Android