I once lost my box of Falcon rebuildables and parts. I looked everywhere and gave up. It finally surfaced. It was marked "Old Matchbox Cars" on the other end of the box and was sitting right out on my shelf. Duh! Found it when I took everything off the shelf and I noticed it was too light to be full of Matchbox cars.
I still have a Hubley Renault Daulphene that's been in hiding at least ten years. I have everything but the body in the right box. I just haven't seen the body in a long time. Still, I know one of these days I'll pop open a box and there it will be!
And there's the guys who leave models behind at NNL East! Pretty much an annual thing that there's 1-3 models left on the tables when we go to knock them down. Usually we get a frantic call that evening and we make arrangements to get the model back to them. I do have a very nice Corvette that someone left behind a long time ago. We searched the registration sheets, put it out there, and nobody ever claimed it. So if you know of someone who complains they had a model stolen at our show, have them give me a call!