Used miners with warranty
Used miners with warranty
Used ASIC miners for Bitcoin and for Litecoin with Dogecoin at lower prices than new machines – Antminer S19, S21+ Hyd, L9, L11 or Avalon. We give our own 12-month warranty on every used miner; the supplier sells them as “out of warranty”, i.e. without the manufacturer's warranty.
For every machine you can see the hashrate, power draw and today's earnings in CZK. We handle claims and repairs at our own service centre in Prague 10, and you can also place a used miner in our hosting. Looking for a specific model? Write to us.
- 11models available
- 4algorithms
- from 9 344 Kčprice
- Air 9Hydro 2 cooling
- up to ≈ 343 Kčrevenue / day today (before electricity)
Profit = today’s revenue based on network difficulty and the exchange rate − electricity at the selected price. Our hosting = the cheapest location with free capacity (Nigeria #2), price converted from USD at today’s exchange rate. Revenue changes; this is not a forecast.
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Our hosting
Ship your miner straight to the data centre – electricity from 1.16 Kč/kWh
We ship the machine directly to our data centre in the Czech Republic, the USA, Finland or Nigeria. Discounted machine price, setup, monitoring and servicing – we take care of it all.
from 1.16 Kč/kWh
Miner hosting →
How to choose a used miner
First decide where the machine will run – that determines the cooling. For each type we show the machines from this collection that earn the most today from 1 kWh of electricity.
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hosting, workshop
Air-cooled
The most common and cheapest option: fans cool the machine, so it only needs a supply of cool air and a way to remove the heat. It is loud, though (usually 70–80 dB), so it does not belong in a flat – it suits our hosting, a workshop or a plant room, and at home only with a soundproof box.
9 models in this collection, most profitable per 1 kWh:
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Goldshell SC Box II (used, without PSU)
1.9 TH/s · 400 W
from 29 299 Kč
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Canaan Avalon A15 Pro (used)
221 TH/s · 3713 W
from 34 515 Kč
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quieter, heat for heating
Hydro (water cooling)
A liquid in a closed loop cools the chips and a dry cooler or heat exchanger removes the heat. Hydro machines are quieter and more powerful, but they need a water loop and usually a three-phase supply. You can use the heat to warm water or for heating.
2 models in this collection, most profitable per 1 kWh:
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Antminer S21+ Hyd (used)
395 TH/s · 5925 W
from 52 556 Kč
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Canaan Avalon A1566HA (used)
480 TH/s · 8064 W
from 75 608 Kč
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farms, almost silent
Immersion cooling
The machine is submerged in dielectric fluid in an immersion tank – it is almost silent and the chips stay at an even temperature. It needs a tank, a pump and a cooler, so it is best suited to farms and hosting.
There are none in this collection right now. Write to us – we will check availability.
Immersion tanks and fluid
Used miner comparison
Sorted by algorithm and, within it, from the most efficient (fewest J per unit of hashrate). We recalculate revenue every hour, and profit using the electricity price selected above the miners: on hosting at 1.16 Kč/kWh.
| Model | Hashrate | Power | Efficiency | Cooling | Noise | Price from | Revenue / day | Profit / day |
|---|---|---|---|---|---|---|---|---|
| Bitcoin SHA-256 · 7 models | ||||||||
| Antminer S21+ Hyd (used) | 395 TH/s | 5,925 W | 15.0 J/TH | Hydro | 50 dB | from 52 556 Kč | 282 Kč | 117 Kč |
| Canaan Avalon A1566HA (used) | 480 TH/s | 8,064 W | 16.8 J/TH | Hydro | 50 dB | from 75 608 Kč | 343 Kč | 118 Kč |
| Canaan Avalon A15 Pro (used) | 221 TH/s | 3,713 W | 16.8 J/TH | Air | 75 dB | from 34 515 Kč | 158 Kč | 54.24 Kč |
| Antminer S19j XP (used) | 151 TH/s | 3,247 W | 21.5 J/TH | Air | 75 dB | from 12 381 Kč | 108 Kč | 17.25 Kč |
| Antminer S19 XP (used) | 141 TH/s | 3,032 W | 21.5 J/TH | Air | 75 dB | from 12 221 Kč | 101 Kč | 16.11 Kč |
| Antminer S19j Pro / Pro+ (used) | 120 TH/s | 3,300 W | 27.5 J/TH | Air | 75 dB | from 9 344 Kč | 85.69 Kč | −6.37 Kč |
| Antminer S19 Pro (used) | 100 TH/s | 2,950 W | 29.5 J/TH | Air | 75 dB | from 8 973 Kč | 71.41 Kč | −10.88 Kč |
| BTCB2 Blake2b-Sia · 1 model | ||||||||
| Goldshell SC Box II (used, without PSU) | 1.9 TH/s | 400 W | 211 J/TH | Air | 35 dB | from 29 299 Kč | 91.55 Kč | 80.39 Kč |
| Litecoin + Dogecoin Scrypt · 2 models | ||||||||
| Antminer L11 (used) | 20 GH/s | 3,680 W | 184 J/GH | Air | 75 dB | from 113 435 Kč | 144 Kč | 41.33 Kč |
| Antminer L9 (used) | 16.5 GH/s | 3,465 W | 210 J/GH | Air | 75 dB | from 50 239 Kč | 119 Kč | 22.13 Kč |
| Other Other · 1 model | ||||||||
| SuperScalar K10 (used) | – | 1,973 W | – | Air | – | 0 Kč | – | on request |
Hashrate, power draw and noise are stated by the manufacturers. Efficiency = power draw ÷ hashrate. Revenue = hashrate × today’s revenue of the algorithm’s most profitable coin (before electricity and pool fees); profit = revenue − electricity at the selected price. For machines with several hashrate options we use the base hashrate from the product card.
At home or on our hosting?
The result of mining depends mainly on the electricity price. Comparison for the machine in this collection that earns the most per 1 kWh – Goldshell SC Box II (used, without PSU).
At home or at your business
- Grid electricity costs a Czech household roughly 4.5–6.5 Kč/kWh (2026); it is cheaper from your own solar panels or on a business tariff.
- A powerful ASIC needs its own circuit and ventilation, and you have to expect noise – air-cooled machines are usually 70–80 dB.
- You can use the miner’s heat for heating, but in summer you have to get rid of it.
Profit at 4.5 Kč/kWh: 48.35 Kč / day
On our hosting
- Electricity from 1.16 Kč/kWh including management (Nigeria #2), 7 locations with free capacity.
- With prepaid electricity, up to 30% cheaper.
- New miners bought from us that run on our hosting come with a 7-year warranty. We take care of noise, cooling and repairs.
Profit at 1.16 Kč/kWh: 80.39 Kč / day
Profit = today’s revenue − electricity for 24 hours, before pool fees. Network difficulty and the exchange rate change; this is neither a forecast nor a promise of revenue.
FAQ about used miners
What warranty does a used miner have?
We give our own 12-month warranty on used miners from the Used section. The manufacturer's warranty no longer covers them – the supplier sells them as “out of warranty”. We handle claims in our own service centre in Praha 10; more on the page Warranty and claims.
Is it better to buy a used or a new miner?
A used machine is a cheaper way in, but it usually has worse efficiency, so it mines less from each kWh. With cheap electricity or in hosting it can pay back faster than a new one; with expensive electricity it will not make money. You will find an analysis in the guide New or used ASIC?
What is the difference between Antminer S19 versions?
The S19 series has many versions (S19, S19 Pro, S19j Pro, S19 XP, Hyd) with different hashrate and efficiency. You will find an overview in the article Antminer S19: differences between versions.
How much does a used miner earn?
The same as a new machine of the same model – revenue depends on hashrate, network difficulty and the exchange rate. We show the current value on its card and in the table; the switch above the listings shows the profit after electricity.
Can I put a used miner in your hosting?
Yes, we will place a used machine in a data centre with cheaper electricity too and take care of operation. You will find locations and prices on the page Miner hosting.