If you have no feedback yet, you should expect special, or extra scrutiny on your first transaction, especially if you are selling something. No way I would do anything in that instance unless there was an escrow arrangement. Stuff on here, in general is too expensive, and there are too many crooks out there.
Also Wpines, did you really complain that you accepted multiple offers and someone left you bad feedback? That shows a lack of integrity right there. Why would you do that? Once you accept an offer, it's done. You get paid, then you ship it. If you were going to take another offer, because of no payment for a certain amount of time, then you should have contacted the original buyer, and given them a deadline, and put the other buyer on hold; because you already made a deal. That's the kind of feedback I am interested in when someone has something for sale.