You could mining on POW88.COM . https://bitcointalk.org/index.php?topic=1708231.0  this is our post, and our maintenance fee is lowest all around world, we provide Avalon 7 ,Electricity fee only  $1.1023/6THs/Day the price only $768.37.

As a token of appreciation for being our valued customer, pow88.com would like to issue you a special $28.945 discount coupon towards the purchase of a new Avalon7. All customers who purchased an A7 in SHOP are eligible for this promotion (A7 hash rate purchased from EXCHANGES are beyond the promotion) .

Please email the customer@pow88.com fellow message: Your register account, the amount hashes you've hold on . You will revcieved coupons form pow88.com. 

One A7 hold can receive one coupon.

Coupon redeem period: between January 12 to February 12th 2017.

Coupon Expiry date : It  will last 30 days since you get coupon.

As always, pow88.com values your loyalty and we look forward to building lasting relationships with all of our customers. This coupon is one way we can say thank you for making what we do possible.