What's to stop them coming round, picking up, then going back to ebay saying that I didn't post the item?
eBay will see that the buyer didn't pay you yet

What's to stop them coming round, picking up, then going back to ebay saying that I didn't post the item?
I'd be wary personally, but then that's because I've been stung in the past.
May well be legit, you never know![]()