A hint for kano miners: Selling 11.85 th/s S9, works great.
Will include two $250 coupons. See post in marketplace.

Don't want my S9-I can sell you just coupons for $62.5 ea (75% off).
For those who think that coupons ought to be free...I got those for grossly overpaying for some other Bitmain item, hence need at least some back.