How about MP, Vanilla, ReloadIT, WU, MG, etc?
But those aren't reversible. If he paid via those methods, he wouldn't be able to claw back his money, so that's out the window
OP: I'm kidding, of course. You may want to check into more reliable (for both parties) methods of payment, like the ones listed above. Also check into Walmart to Walmart transfers since they have a flat rate of $9.50 per transfer.