I'm buying bitmain  coupon
1- needing coupon 350, 420 or 500 usd
2- We can do this for everyone to follow one at a time.
3- we can qualify in buying trust
4- payment in BTC
5- we can also make copun exchanges and rest in fashions as payment method
6- I prefer to make the negotiation open without using PM so that everyone can follow the outcome
7- we can communicate on social networks like facebook and whatsapp for better security or use guarantee methods on the purchase of coupons
8- we can use custody services for our security