Im not sure.. you could be right, but you cant spit without seeing an AD vintage wheat truck here. And they are all decaying very fast because they really don't suit the needs of anyone anymore. My thought is to at least try and give them some time. It has been my experience there is no money in anything related to AD vintage trucks no matter what size. Its a labor of love and no expectation of making a dime.
Imagine a 30/40ish computer geek, nsa employee, you know, new age guy looking for a vintage truck and you can present them with a garage ready, DUMP bed with a full pressure 235 engine that you can get the tires serviced anywhere because they are single piece w/radials. Would be fun to explore this idea anyway.