Ive had bad experiences with ebay a bloke sent me an item I didn't receive I got my money back. Also one time someone sent me my thing and it wasn't as he had described it. Again I got my money back. But worst of all on one of our paypal accounts with ebay, someone in the U.S.A withdrew amounts of $50 ago a few times from our account without authorisation. Fortunately again paypal are a good company and gave us the money taken from us.
But it shows you, you gotta be aware.