If you are pricing a Antminer S21+, start here: the Antminer S21+ resale value is $1,100 as of October 30, 2026. It rests on 5 real sales, not asking prices.
Over the last 90 days the price is down 5% on the 90 days before, so buyers are paying less. Also, we rebuild this page every day from the ING sold-comps data.
Antminer S21+ resale value: the numbers
| Window | Sales (n) | Median | Middle half | Low to high |
|---|---|---|---|---|
| Last 90 days | 5 | $1,100 | $1,100 to $1,175 | $950 to $1,500 |
| Previous 90 days | 6 | $1,162 | $1,076 to $1,219 | $949 to $2,000 |
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 $4.89.
How it compares with the Antminer S21
The nearest model on the price ladder is the Antminer S21. It has a 90-day median of $985 on 11 sales. So the Antminer S21+ sells for 12% more. The gap is small, so condition and shipping decide most deals.
What is driving the Antminer S21+ price
The 90-day median is down 5% on the window before it. That looks like a real move, not noise. Still, it rests on a modest number of sales, so treat the size as approximate. However, we cannot see why each buyer paid what they paid. Instead, we see the price that cleared. In general, falling used prices go with a weaker mining margin or with newer machines taking the demand.
Is the Antminer S21+ price fair against hashprice?
Hashprice is $32.93 per petahash per day today. At the rated 216 TH/s and 3,564 W, the Antminer S21+ grosses $7.11 a day before power. As a result, its break-even power price is 8.3 cents per kWh.
| Power price | Profit per day | Payback on $1,100 |
|---|---|---|
| 5 cents | $2.84 | 388 days |
| 8 cents | $0.27 | 4076 days |
| 12 cents | -$3.15 | never |
Our fair value is a year of profit at 5 cents with hashprice held flat. For the Antminer S21+ that comes to $1,035. The sold price is 106% 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+
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+ that means $1,100, give or take the $1,100 to $1,175 band.
-Nick
ING Mining
This is general information, not financial advice. Crypto is volatile, and you can lose money. Please do your own research.