OK, look people. Just because vehicle spawns somewhere doesn't mean it's a ghost vehicle. The only ghost vehicle is Glendale in Back o Beyond. It's named "ghost car" because it rolls down when it spawns, and that's only because it spawns on a slanted surface. Now that might be intentional, but might also be a bug.
Anyway, there are no other ghost cars than this one. Sure, you can find smashed vehicle all over SA, mostly in Badlands and the Desert, but the fact that they're smashed doesn't mean that they're ghost cars. Got that!? Good...