Antminers easily sell on eBay for $150 to high rep members that prob wont chargeback etc. $90 seems low, especially since they will still mine about 0.46BTC over their lifetime, 0.16 in just the next month and 0.10 the month after.
How am i going to charge back with BTC? Please just leave, i even offered escrow...
WTF? I never said you would or could chargeback? I'm saying that a person could sell their antminer to a reputable person on eBay in fiat without any problems, instead of selling it to you for 0.15 bitcoins which the miner will make within a month.
It's interesting how you derived your conclusion though. It's so obvious that bitcoin transactions are not reversible that I'm surprised you didn't further ponder on what the meaning could be.