I can't resist wasting everybody's time (including my own) with a somewhat related story....
Our church is also used as the School Hall for our local Primary, as well as a community space. Consequently, it tends to fill up with 'lost property', as people leave various things lying about. We ask around, but after a while we tend to just dispose of this stuff one way or another. (The half case of wine was something of a 'win'.)
One item lying about for about 5 years has been a fold-up screen (for projecting on) in a really solid wheeled transport case. Nobody seemed to know who it belonged to or recall that it had ever been used by anybody. So in the end, one of the churchwardens sold it on eBay for a bargain £200, and a guy came from London (100 miles) to collect it.
Almost immediately, one of the schoolteachers said that he had been 'looking after' this item for a friend of his, and that he thought it was worth about £2,000! Everyone believes this teacher (which is probably fair), but cannot comprehend why he had left it in the church for about 5 years without using it or labelling it or ever mentioning to anyone that it is his. There was then loads of panic, with some people saying, "we have to give him £2,000" others, "just give him the £200" others "tell him he snoozed, so he loosed", others "we must tell the Bishop that we have sold stolen property", etc, etc.
I got involved after a day or two, and asked if the buyer might be willing to undo the sale and let us take back the item and get his money back. Fortunately he was a really good guy and offered to do that if someone would collect the screen+box from him, which I ended up doing. So all's well that ends well, although I'm out the 3-hour recovery trip, plus the £50 that I felt the buyer ought to be given for his trouble.
Sheesh!