consider this: if you had started your search expecting to have to address paint and body issues, that'd dramatically change your search criteria and price range, right? so what about this car would make possible surprises like so insignificant that it wouldn't change your price range?
personally i'd either change my search criteria and look for a deal on something with a clear history that needs work and make a bit of a project out of it, or i'd hold out for something with a less mysterious past.