不要理他，投標結束的兩天后提交UID（Unpaid Item Dispute），如果在case開了后他還是沒付款，那他的賬號會受影響
http://pages.ebay.co.uk/help/s ... .html

估計是買家投標成功后，在頁面底部看到“see what other people bought after buying this item”一欄，然后點進去看，發現其他賣家的價格更低，所以就反悔不要了

發這封郵件給他：
“Dear buyer,
Sorry you're not happy with your winning bid. The final auction price cannot be altered, actually I was hoping for more than what you won it for, and I will not sell for any less.?
Your item will be shipped within XX days of payment. If you no longer wish to complete this transaction, I'll be more than happy to cancel it for you, please let me know. Otherwise I'll be expecting your payment shortly.”
要是他想取消訂單，你就去取消，理由選“buyer requested”；要是他付款了，就發貨，保留一切證據（產品圖片，聊天記錄），以免他申請SNAD claim。

對這個買家無語了，還只出一半的錢？關鍵是又不是只有他在競拍，還有其他人啊。你可以使用Second Chance Offer功能，賣給其他出價者。至少他們出的價格接近底價，，