I was selling an item on eBay and in my auction terms, I said that payment must be received within three days. The buyer said she would pay a couple days ago but she still hadn't. Today, I filed a NPB complaint and her husband just e-mailed me back and told me his wife had been in a car accident and that she won't be able to go through with the transaction. Has this happened to anyone before? What do you do in these types of situations?