There are tons and tons of seller horror stories, especially with buyers from Asian countries. They will buy an iPhone or something, pay for it, then request a return/refund from the seller but they send back a box of scrap. Even if you don't manually refund their money, they will dispute it, and eBay just sees the return tracking # as 'delivered' and gives them their money back. It really doesn't matter how much you protest, eBay pretty much always sides with the buyer.