antminer S5 lotto 7, USD 394 = btc 1.417. miner used? crazyyyyyyyyyyyyyyy
they are almost (seemingly) in a monopoly position, hence the price.
However, to compare-check ebay with SP20 somewhere above 600 in final price. There are a couple auctions ending in 4-5 days, so we will see what the price would be.
SP30 is bidding at $2333 right now, which is equal ~$520/S5 ($596 by GH minus ~$76 for PSU)
Broken SP20 for parts or repair has the bid at $307 right now.
It is what it is.
I conclude that right now there is misbalance of supply/demand=sellers market.
In January there was a severe buyers market, hence Bitmain price-"killed" SP20, which was sold for a loss for the final batch at $400.