I sold a book to someone for 99p. It was a heavy book and I misjudged postage so was going to be out of pocket. I just put it down to experience as I've sold a few things recently so am not out of pocket just hadn't made a penny on this book. Anyway, buyer paid so it's all packaged up ready to go and now she's messaged saying she made a mistake, her computer had frozen whilst she was viewing the book and didn't mean to buy it??? WTF?? Why pay? Ebay have taken their fee, I've already packaged it, what should I do? TIA