I have fallen victim of a different scam. I sold some stamps on
ebay (China Local Posts) and received payment by PayPal before sending the stamps by registered mail. Then the buyer contacted PayPal saying that they never received the stamps. So the PayPal policy was to refund the purchase fee. Unfortunately for me, the buyer was in the PRC. The China postal system does not register the delivery of registered mail, so despite having pictures of the envelope I sent, I could not recover the funds. The scammer was incredibly well informed!