Mining economics
Used Goldshell KD Box price Rose 356% in 30 Days
The used Goldshell KD Box price rose 356% in 30 days: $28 to $128 on real eBay sales, with Miner Math.
November 2, 2026All guidesBuying guidesMining economicsSetup & operationsHardware & repairMining basicsCommentaryEn españolLatest mining news →
Mining economics
Used S19 XP Price Fell 20% in 30 Days: $350 to $279 on eBay
The used S19 XP price fell 20% in 30 days: $350 to $279 on real eBay sales, with Miner Math.
November 1, 2026
Setup & operations
Antminer S19 Heat Output: BTU, Ventilation and Ducting
Antminer S19 heat output in BTU/h, plus practical CFM estimates, ducting, make-up air and ventilation planning for one, five or ten miners.
September 11, 2026
Setup & operations
Antminer S19 Power Requirements: 240V, Amps and Breakers
Antminer S19 power requirements explained: 200–240V input, amps, two power cords, daily kWh, circuit planning, PDUs and electrical safety.
September 11, 2026
Buying guides
Avalon Q vs Antminer S19 XP: What Quiet Actually Costs
The Canaan Avalon Q is the more efficient machine and the wrong buy for almost everybody: $22.21 a terahash against the refurbished S19 XP's $4.96. What...
August 18, 2026
Buying guides
Antminer S21 Pro vs S19k Pro: One New Machine, or Ten Used Ones?
One new Antminer S21 Pro 245T costs the same as ten used S19k Pros once freight is counted. We ran both baskets on our own shelf...
August 16, 2026
Buying guides
Antminer S19k Pro vs S19 XP: The $320 Only Some Sites Get Back
Two used Antminers on the same shelf, $320 apart. The XP is 7% more efficient and 23% denser, and for most buyers it is still the...
August 15, 2026
Buying guides
Used vs New ASIC Miners: What Fails, What Repairs Cost, and When Used Wins
Used wins only where power is cheap enough that a 34 J/TH machine still clears its bill. The two gates that decide it, a crossover calculation...
August 11, 2026
Buying guides
Antminer S19 vs S19k Pro: The Cheaper Used Miner Costs More to Own
A boosted Antminer S19 is $130 cheaper than an S19k Pro and burns about 816 kWh a month more to mine slightly less. Break-even, payback and...
August 10, 2026
Buying guides
NerdQAxe++ vs Antminer S19: A Desk Miner Against 3.25 Kilowatts
The desk miner is the efficient one, at 16.2 J/TH against 34.2. Break-even rates, the 3.75-cent crossover, the real solo odds, and which buyer each machine...
July 30, 2026
Buying guides
Kaspa Miner vs Litecoin Miner: Antminer KS5 Pro vs L9 17G
Kaspa miner vs Litecoin miner: the Antminer L9 17G breaks even at 9.15 c/kWh, the KS5 Pro at 5.32 c. And 87% of the L9 is...
July 30, 2026
Buying guides
Antminer S19 XP vs S21 Pro: Which One Actually Pays You Back?
The used S19 XP returns capital faster below 5.5 c/kWh; above it the new S21 Pro wins. Break-even, payback and the 208 V trap, with the...
July 29, 2026