I sold an expensive item on eBay, an upgraded iPhone that I didn't want to change so I kept mine and sold the new one. First winning bidder didn't pay and stated they didn't want if I couldn't get it to them abroad within 24 hours! I relisted, winning bidder paid, then sent me a message saying they didn't realise the phone was locked to a network as they had not read the listing! Where do I stand with this if they decide they want their money back? It was listed as locked.