Just pay with a credit card through Paypal, and if they don't give you the stuff you bought, then call up your credit card company and they will pay you back.  I had this happen to me once, I bought a Nokia 8890 for $450 and the guy just didn't send it, and didn't reply my emails, so I have to go back to my "Sent items" in outlook and print out the emails I sent to the guy, proving I have tried to contact him, and I faxed it to the credit card company, and I got my money credited back to my card.  So don't worry, and besides, someone with that good of a feedback would usually send it, unless you are really really unlucky