I'm sorry, but I'm having a problem with understanding why this particular car is attractive to a buyer. I too can totally appreciate the patina and stories that an old car can tell, but this car has awful patina, and has no stories.
Well, I should say that the only stories it would have are probably not that interesting.
In my opinion, this is exactly the problem with vintage american iron built around 1970-- The materials that were used were so inferior/bad that when survivors are found, often the paint, and especially the interiors, are shot. When you find cars that were more expensive when new, their materials are not this deteriorated. Cadillac, and for the most part, low mileage survivor European cars (i.e.: Ferrari, Mercedes, Porsche, and BMW) must have had significantly better materials and assembly processes, because I just don't see this "spontaneous decay" phenomenon with those cars.
Another example:
web page
I'm sorry, but someone is paying a premium for original paint that could have been done better by either my 90-year old Grandma, or 6-year old niece...
Just another example of the collector world not making much sense to me, I guess...