I have bitmain coupons selling at 80% off

https://imgur.com/69RjpXr

Coupons : amount : sale price : % off

100$: 12 :   20$ : 80% (expiring end of July)

I would like to use escrows (minerjones). Also, I have posted my coupons in localbitcoins as another escrows option.
https://localbitcoins.com/ad/777233/cash-out-your-bitcoins-bitmain-coupons