I am new to the mining, I have ordered the S9 from Bitmain, but am now waiting for 2 months to get it.
In the meantime, I am trying to purchase an S7. Are there suggestions of a where I could get one? Then how can I ensure that a used Antminer will meet the advertised specs the seller is posting?
Thanks.
you can ask in goods will find cheap mining tools (S7 or S9).
also remember paypal accept buying bitcoin mining tools so you can buy from any site accepted paypal