What does a used Antminer S21 Pro actually sell for? About $1,600. We checked 5 completed eBay sales over 30 days to find the Antminer S21 Pro used price, and the typical spread is $1,599 to $1,800.
Over the last 90 days the picture is up 7% against the 90 days before. Also, we rebuild this page every day from the ING sold-comps data.
Antminer S21 Pro used price, window by window
| Window | Sales (n) | Median | Middle half | Low to high |
|---|---|---|---|---|
| Last 30 days | 5 | $1,600 | $1,599 to $1,800 | $1,399 to $2,397 |
| Last 90 days | 9 | $1,600 | $1,570 to $1,697 | $1,399 to $1,850 |
| Previous 90 days | 9 | $1,500 | $1,450 to $1,605 | $1,400 to $1,700 |
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 $6.84. Shipping is not in these prices. When the buyer paid it, the median charge was $85, and 38% of sales shipped free.
Is the Antminer S21 Pro cheaper than the Antminer S21 XP?
The nearest model on the price ladder is the Antminer S21 XP. It has a 90-day median of $2,288 on 16 sales. So the Antminer S21 Pro sells for 30% less. In short, that gap is wide, so the two are not close substitutes.
Condition and the price you can expect
Condition changes the price, so we keep it apart. Used: $1,600 on 9 sales. New or open box: $2,000 on 6 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 Pro price against mining economics
Hashprice is $33.61 per petahash per day today. At the rated 234 TH/s and 3,510 W, the Antminer S21 Pro grosses $7.87 a day before power. As a result, its break-even power price is 9.3 cents per kWh.
| Power price | Profit per day | Payback on $1,600 |
|---|---|---|
| 5 cents | $3.65 | 438 days |
| 8 cents | $1.13 | 1420 days |
| 12 cents | -$2.24 | never |
Our fair value is a year of profit at 5 cents with hashprice held flat. For the Antminer S21 Pro that comes to $1,334. The sold price is 120% of one year of cheap-power profit. That is in line with the mining maths. 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 Pro
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 Pro that means $1,600, give or take the $1,599 to $1,800 band.
-Nick
ING Mining
This is general information, not financial advice. Crypto is volatile, and you can lose money. Please do your own research.