Has this happened to you? I'm new to selling on eBay and could use some advice. I sold a pair of gym shoes recently for $6. Buyer paid, I shipped it off via USPS. A week and a half later, buyer claims she was not there to receive the box, and that the post office has returned it to me. Now she wants me to send it to her P.O. Box. I charged a reasonable amount for s&h the first time around ($5), basically my costs. Assuming I get the box back, should I charge her again for s&h?