So I don't know about the problems that will arise when someone pulls out of an escrow payment.
Buyer shows interest.
Buyer pays escrow.
Escrow confirms payment released.
At this point the trade is locked. You have to trust the escrows.
You release the hardware / service.
Buyer confirms.
Escrow releases.
What you're talking about, is if the buyer & the escrow conspires against you to rip you off. One, that is highly unlikely, the escrow provider would never get any more 'escrow' requests and he will lose a steady income which would be multiple times what the buyer could bribe him with.
This isn't your typical
sarkari daftar where the officials are easily bribed.