I think a lot of the desire to own a vintage Fender is the mystique surrounding the the company and it's instruments. The not knowing who's owned it, who's played it, were it's been etc.
There is something attractive about old instruments. I've owned a few instruments that were 20 plus years old. These were Yamaha basses, neither Fender or Gibsons hold any kind of allure for me.
There's something very nice about old, very old acoustic instruments.