I have Bitmain 2 accounts with a total of 66 (54,12) $400 Antminer S2 coupons and 60 (50,10) .05 BTC Antminer S1 coupons.  They expire 5/29 and 5/30.  Contact me if you have interest in full or part.  Please have a plan as to the best way to execute - especially if partial.  I assume some sort of escrow situation will likely be needed.  Thanks.