What a used Samsung Galaxy S21 Ultra actually sells for, from 22 listings Flipify tracked on Facebook Marketplace, eBay, and OfferUp since Oct 26, 2026. Updated .
A used Samsung Galaxy S21 Ultra typically sells for $259 (US Dollar), with most listings between $230 and $269. It's cheapest on eBay ($239 typical). Anything under $230 is a good deal.
| Day | Median | Listings |
|---|---|---|
| Oct 26, 2026 | $265 | 3 |
| Oct 27, 2026 | $265 | 5 |
| Oct 29, 2026 | $259 | 3 |
| Oct 30, 2026 | $246 | 8 |
Listings priced at least 10% under what that model usually goes for. Titles are the seller's own; good deals usually sell the same day, so some may be gone.
| Found | Listing | Price |
|---|---|---|
| Oct 30 | Samsung Galaxy S21 Ultra 5G 6.8" 128GB (Unlocked) AM Screen Black - Fair(opens eBay)128GB · Used · eBay | $22515% below typical |
| Oct 30 | Samsung Galaxy S21 Ultra 5G 256GB Black (SM-G998U) Factory Unlocked(opens eBay)256GB · Used · eBay | $23011% below typical |
| Oct 30 | Samsung Galaxy S21 Ultra - 128 GB - Phantom Black (Unlocked)(opens eBay)128GB · Used · eBay | $21021% below typical |
| Oct 30 | Samsung Galaxy S21 Ultra 5G - Unlocked - 128GB - Phantom Black - Good(opens eBay)128GB · Used · eBay | $22017% below typical |
| Oct 27 | Samsung galaxy s21 ultra 128gb(opens OfferUp)128GB · Used · OfferUp | $22515% below typical |
| Oct 26 | S21 ultra 128gb(opens OfferUp)128GB · Used · OfferUp | $21519% below typical |
Flipify watches every marketplace and alerts you seconds after an underpriced Samsung Galaxy S21 Ultra is listed.
How we calculate this: asking prices from public marketplace listings Flipify matched to the Samsung Galaxy S21 Ultra, one per listing, with placeholder and outlier prices removed. Each currency is its own market of local listings, not a conversion. Asking prices are not sale prices.