My next door neighbor bought a sweet 58 cameo pickup several years ago missing a few hubcaps. He ended up finding them at an old guys place. He told me, "I really need to take you down there. He buys these cars and restores them and then sticks them in old shelters. The shelters are scattered all over out in the woods and he has parts galore." I never went. He died a couple of months ago.
When I bought my current house, built in 1915, there was a 40 Ford convertible in the garage, in barn find condition. It didn't go with the house and was later street rodded.
I suspect the OP was truly wondering if anybody had heard of anything like a private sale. Perhaps he had heard a rumor about something changing hands he'd like to track down, or, maybe his car had been found and sold as a barn find. A few years ago, a friend's dad was operating a bull dozer, leveling out a building site. Within view was a pole barn with several brass era cars in it. He told his son, who promptly looked into getting the cars out. Not long after, the cars disappeared. I suspect some barn finds are actually stolen cars. After a car sets around in a barn or garage a while, titles get lost and proof of ownership gets muddied and possession is 9/10ths of the law.