Buy or wait? Tracking began 2026-11-11, so there isn't enough history for a buy/wait call yet. Today the cheapest clean listing is 35% under the typical one.
Cheapest Samsung Galaxy S21 128GB unlocked listings right now
| Listing | Condition | Price + ship | ||
|---|---|---|---|---|
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Gray T-Mobile Unlocked W107079 Buy It Now | Used | $107 sale: was $124, −13% · $0.84/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Gray Unlocked W107106 Buy It Now | Used | $107 sale: was $124, −13% · $0.84/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G - 128 GB - Black Network Unlocked No Physical SIM Card Buy It Now offers | Used | $110 · $0.86/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Gray Unlocked W107521 Buy It Now | Used | $112 sale: was $124, −9% · $0.88/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Gray Unlocked W107782 Buy It Now | Used | $121 sale: was $124, −2% · $0.94/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Gray Unlocked Black Spots Excellent Buy It Now | Used | $123 · $0.96/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Pink T-Mobile Unlocked W108056 Buy It Now | Used | $125 · $0.97/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U1 128GB Unlocked Good Used Buy It Now | Used | $130 · $1.02/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U1 128GB Factory Unlocked Smartphone OPEN BOX Grey Buy It Now offers | Used | $133 · $1.04/GB storage | View on eBay |
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Samsung Galaxy S21 5G Phantom Pink 128GB Unlocked - Back Pink Spots Buy It Now | Used | $136 · $1.06/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G - 128GB - Phantom Gray (Carrier Unlocked) C-Stock Buy It Now | Good - Refurbished | $140 · $1.09/GB storage free ship | View on eBay |
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Samsung Galaxy S21 S991U 5G SM- G991U1 - 128GB - FACTORY UNLOCKED - GOOD Buy It Now | Used | $140 · $1.09/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G - 128GB - Phantom Gray (Carrier Unlocked) B-Stock Buy It Now | Very Good - Refurbished | $153 · $1.20/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G 128GB G991U Unlocked - Good Buy It Now | Good - Refurbished | $162 · $1.27/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G G991 128GB Unlocked - Good Buy It Now | Good - Refurbished | $163 · $1.27/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G 128GB (Unlocked) Pink 6.2" Android w/ Box Buy It Now | Used | $165 · $1.29/GB storage | View on eBay |
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Samsung Galaxy S21 5G 128GB SM-G991U (T-Mobile-GSM Unlocked) Gray (E-0093) Buy It Now offers | Used | $165 · $1.29/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G SM-G991U 128GB Phantom Pink T-Mobile Unlocked W110433 Buy It Now | Used | $166 · $1.30/GB storage free ship | View on eBay |
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Samsung Galaxy S21 - 5G - SM- G991U1 - 128GB - FACTORY UNLOCKED - EXCELLENT Buy It Now | Excellent - Refurbished | $170 · $1.33/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G 128GB G991U Unlocked - Very Good Buy It Now | Very Good - Refurbished | $172 · $1.34/GB storage free ship | View on eBay |
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Samsung Galaxy S21 SM-G991U 128GB Unlocked Excellent Condition All Colors Buy It Now | Excellent - Refurbished | $173 · $1.35/GB storage free ship | View on eBay |
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Samsung Galaxy S21 SM-G991U 128GB Unlocked Good Condition All Colors Buy It Now | Good - Refurbished | $173 · $1.35/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G 128GB Gray SM-G991U (Unlocked) Fully Functional DG8790 Buy It Now | Used | $174 sale: was $178, −5% · $1.36/GB storage | View on eBay |
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Samsung Galaxy S21 5G SM-G991U -128GB Phantom Gray Verizon + UNLOCKED - OPEN BOX Buy It Now | Open box | $179 · $1.40/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G 128GB G991U Unlocked - Excellent Buy It Now | Excellent - Refurbished | $181 · $1.41/GB storage free ship | View on eBay |
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Samsung Galaxy S21 5G G991U1 128GB Factory Unlocked Smartphone OPEN BOX Violet Buy It Now | Open box | $188 · $1.47/GB storage | View on eBay |
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Original Factory Unlocked Samsung Galaxy S21 5G SM-G991U1 128GB GRAY Open Box Buy It Now offers | Open box | $189 · $1.48/GB storage | View on eBay |
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Samsung Galaxy S21 SM-G991U1 - 5G - 128GB - FACTORY UNLOCKED - OPEN BOX Buy It Now | Open box | $189 · $1.48/GB storage free ship | View on eBay |
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New Other Samsung Galaxy S21 G991U 128GB Unlocked SmartPhone Buy It Now | Open box | $190 · $1.48/GB storage free ship | View on eBay |
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GSM UNLOCKED - Samsung Galaxy S21 5G SM-G991B/DS 128GB Gray 6.2'' - OPEN BOX Buy It Now | Open box | $195 · $1.52/GB storage free ship | View on eBay |
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Where today's prices sit
32 live listings by price (item + shipping). The highlighted bar is the cheapest band.
Price history starts 2026-11-11 — the chart appears after the second daily snapshot.
Market read
Of 32 Buy It Now listings, 23 used (from $107), 9 refurb (from $140). 81% ship free; the rest add $8.79 shipping at the median. The middle half of asking prices runs $133 to $181, so anything under $133 is in the cheapest quarter. Lowest we have recorded since 2026-11-11: $107 on 2026-11-11 — today matches it.
Asking prices of US eBay listings including shipping, as of 2026-11-11 (checked twice a day); we earn a commission on purchases through these links; parts, broken units and accessories are filtered out. How we price.
Head to head
- Samsung Galaxy S21 128GB unlocked vs Samsung Galaxy A25 5G 128GB unlocked
- Samsung Galaxy S21 128GB unlocked vs Samsung Galaxy Z Fold4 256GB unlocked
Compare
- Samsung Galaxy S23 128GB unlocked $132
- Samsung Galaxy S24 128GB unlocked $177
- Samsung Galaxy S24 Ultra 256GB unlocked $331
- Samsung Galaxy S25 Ultra 256GB unlocked $541
- Samsung Galaxy S22 Ultra 128GB unlocked $144
- Samsung Galaxy S22 Ultra 256GB unlocked $160
- Samsung Galaxy S23 Ultra 256GB unlocked $234
- Samsung Galaxy S23 Ultra 512GB unlocked $257
- Samsung Galaxy S23+ 256GB unlocked $176
- Samsung Galaxy S24+ 256GB unlocked $219


























