Seriously, I would tell him to bring cash. MAYBE take a deposit through paypal, other than that do it all in person with cash in hand. If he wants to do paypal to put it on his credit card, tell him to send it to a friend of his and have that friend give him the cash. If hes not willing to do that, something is probably up. He may even have honest intentions right now, but say a few weeks down the road something breaks on the truck, even in perfect condition stuff breaks, and he feels like you screwed him...he might start looking at ways to get his money back. If he succeeds, you are really screwed b/c you are out your truck and the money.