What does a used Antminer S21 XP actually sell for? About $2,288. We checked 16 completed eBay sales over 90 days to find the Antminer S21 XP resale value, and the typical spread is $2,178 to $2,649.
However, we cannot give you a trend yet. The window before this one has fewer than 5 sales, so a comparison would be a guess. Also, we rebuild this page every day from the ING sold-comps data.
The Antminer S21 XP resale value in four windows
| Window | Sales (n) | Median | Middle half | Low to high |
|---|---|---|---|---|
| Last 90 days | 16 | $2,288 | $2,178 to $2,649 | $2,100 to $3,050 |
Every window covers machines sold as pre-owned. First, we remove price outliers. Then we take medians, because one odd sale can wreck an average. Per TH/s that works out to about $8.47.
Does condition change the price?
Condition changes the price, so we keep it apart. Used: $2,288 on 16 sales. New or open box: $3,975 on 5 sales. We use 90 days unless a grade has too few sales, and then we widen to 180 or 365 days. Also, always check the grade before you compare two quotes.
Antminer S21 XP against the Antminer S21 Pro
The nearest model on the price ladder is the Antminer S21 Pro. It has a 90-day median of $1,600 on 9 sales. So the Antminer S21 XP sells for 43% more. In short, that gap is wide, so the two are not close substitutes.
Antminer S21 XP price against mining economics
Hashprice is $33.61 per petahash per day today. At the rated 270 TH/s and 3,645 W, the Antminer S21 XP grosses $9.08 a day before power. As a result, its break-even power price is 10.4 cents per kWh.
| Power price | Profit per day | Payback on $2,288 |
|---|---|---|
| 5 cents | $4.70 | 487 days |
| 8 cents | $2.08 | 1101 days |
| 12 cents | -$1.42 | never |
Our fair value is a year of profit at 5 cents with hashprice held flat. For the Antminer S21 XP that comes to $1,716. The sold price is 1.3 times one year of cheap-power profit. On mining maths alone, the market is over-pricing this machine, so buyers are paying for something besides today’s margin. However, hashprice moves every block, so this verdict can flip. Also, it ignores pool fees, hosting and difficulty growth.
Buying or selling an Antminer S21 XP
Use these numbers as a check on any quote. First, if you want to sell, start on our we buy used miners page. It takes a description and gives you an offer. Next, try the free What is my miner worth? tool. To buy instead, see the Antminer S range or browse all used ASIC miners. Also, every model we track appears on the used ASIC miner prices by model page, and the full table is in the ING Used ASIC Miner Price Index.
How we count these sales
Every figure comes from completed eBay sales that our collector recorded up to October 30, 2026. We keep US-dollar sales of single working machines only. We drop parts, lots, repair listings and sales with no model in the title. Then we remove price outliers. Also, we publish a cell only when 5 or more sales stand behind it. The price is the item price, with shipping left out. For the full rules, read the index methodology. Bitcoin network data for the mining maths comes from mempool.space.
In short, our take is to trust the sold price, not the asking price. For the Antminer S21 XP that means $2,288, give or take the $2,178 to $2,649 band.
-Nick
ING Mining
This is general information, not financial advice. Crypto is volatile, and you can lose money. Please do your own research.