There's no rule that says you have to pay first, that's just the usual way. I've had dealings with people where we have agreed a price subject to review, they ship then I pay. It's all down to building trust between the buyer and seller. It's not easy, there are rarely guarantees but you also have the option to buy retail too, you'll pay more but maybe you'll feel more secure.
Originally Posted by jeep642
Good luck with your transaction.