Your talking about the very few. I'm referring to the amount of models made that came low option, bare bones. Example...a friend of mine, years ago, took a plain 71 Malibu and stuffed a seriously chromed out 427 in it. Caged it, awesome interior, and killer red paint with graphics. Now he had probably $55,000 in this car in the mid 90's. He sold it at the Hot Rod Supernationals for $65,000. That same 71 Malibu, all stock, restored factory, with the 350 in it would have topped out at $10,000...maybe $12,000 on a good day.
Another friend, Denny Terizich, sold a totally customized 62 Bubble Top Belair with a modded fuel injected 409 to a collector from Texas for $85,000. That car in 2000, factory was about the same money...except his was not numbers matching, so he got $85k out of a 6 banger body with totally killer craftsmanship.
That's what I'm talking about.