Today, I have someone in the US who wants to return an item. Item arrived damaged, they said. I accept all returns, however, the description notes two cracks and all of the photos were shot in a fashion that highlights the cracks. They are large cracks, but they are cosmetic only. The price was cheap and it was a BIN, so they dove on it before somebody else did. I've done that.
With the Canadian guy, I sent an email: "What did I mess up?" Big mistake as that starts the clock. This time, I'm putting it on eBay. They have a "Report Buyer" button and I pushed it: "Buyer made a false claim." It was not cracked in shipment.
My policy is: 100% Satisfaction Guaranteed, so I will take the return, but I only pay shipping when I made the mistake, and I have done so many, many times. In the end, it is my Lord and Master eBay's decision, we shall see.