I sold an expensive ring back nearly two months' ago. It was delivered and signed for. Today the buyer has contacted me to say that, in a certain light, they can see a crack in the stone. It was used but there were absolutely no cracks. I have photos online, but they don't show every angle. I've asked the buyer for photos. But I'm thinking I shouldn't refund anyway as they have had the ring for nearly two months. Anything could have happened to it in that time. AIBU to not offer to refund? The buyer hasn't asked yet, but that must be where they're going with this. If I don't offer to refund, will eBay try and force me, even though they've had it for so long?