S9 used to cost 25$!? Wow.
Yes, from late 2019 through the first half 2020 the S9s were simply not profitable at even just a few cents per kWh, so miners were liquidating en masse and buying newer models. Example:
20,000 Used Antminer S9 13.5Th for sale in New York, USA
Price: $22 each
MOQ: 20,000 units
PSU: Included in price, the same brand/manufacturer as the miner
Of course, that was a MOQ of 20,000 units but on ebay, craigslist, telegram groups, and such there were many available at $50 and under in 2022 (down from around $200 in late-2019).
Amazing!
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