I have a few bitmain coupons for sale:

 AntMiner C1 Coupon 50 USD
 AntMiner S3+ Coupon 50 USD
 AntMiner S4 Coupon 400 USD

Validity Time
2014-11-30 11:10:00


I'm asking 0.01btc each. These can be safely traded using the donate option on the bitmain site.