I just sold 2 Radiohead tix on ebay for a mate at work (he doesn't have an ebay account you see), I stupidly listed them as being 2 available of x2 tickets. Which means that I have sold 4 tickets, when he only has 2. One guy has paid already, and the other one is asking about postage (he's in the States). What should I do, either way I am going to get left negative feedback, unless either of them are v v understanding. Any advice would be very welcomed