Just imagine what an old spare tire from his 1950's wagon would be worth - y'know, the authentic one with the shooting platform on the roof.
Maybe there would still be some pebble embedded in the tread from Hernandez, NM. That alone would double its worth. Just by thinking about
it, you'll double your own photographic skills. It also helps to grow a beard and wear a cowboy hat. I don't have either. Perhaps that's why I'm