A vintage, well-kept, and fully functional car is a collector's item, the same as guitar. The major difference, as I've already stated (as with most of the information I've sent your way, I've repeated over and over for you), is that cars degrade and will eventually need replaced unless EXTREMELY well kept for collector's value. A home is very similar, and yes, I'm in a historic area, and houses from the 1700s and 1800s go for FAR more because of their history and age if they're well-kept. The big difference, AS ALREADY MENTIONED, is that a guitar DOESN'T degrade in such a fashion, and anyone who's played a guitar for years, as this man must have, and noticed that the parts don't need replaced like those on a car or an older home should know this.
So, what you're telling me is, stupid people exist? And it's ok? I'm sorry, but I feel no sympathy for someone who missed out on cash because of their own stupid actions. Do I think it's right? No. Do I think it's stupid? Yes. Could have been avoided were it not stupid? Yes.
I actually own and drive 2 vintage MG's - they are in showroom condition - are they worth much? NO! Nowhere near the price of a new similar spec vehicle....