Really, considering what is complete on the outside its really not a bad price which would probably come down on final price. But if you look at the floors being cut out inside and the lack of other parts inside it would be a project.
If that was said about every Chevy in that condition there wouldn't be many left on the road. Better shape then some, worse off than others. Maybe it was an original 1 of 1 car? Maybe it was JFK's first car.