I sold a mid priced item online, for cash on collection (too large to feasibly post).
It had signs of wear, which I took a lot of photos to show, and priced accordingly.
Buyer shows up and spends at least 20 minutes inspecting it, then buys it.
A few days later I then get a message asking to return it.
Aibu to not accept a return? On the basis that they had ample time to inspect it when buying. If they have changed their mind then they could resell, and frankly I can't be bothered to do so myself.