378Ruth is right, they bid so they knew what they were paying. You don't have to change the postage at all, you can agree to cancel the transaction if she isn't happy. It is HER fault, she could see the postage costs and she shouldn't have bid if she wasn't happy to pay them. Some people forget postage costs don't literally cover postage, they cover travelling to the post office, packaging equipment and your time. Oh and now ebay fees! So you don't need to change it.