On the other side of the coin, it inflates the "perceived value" for owners of, not so restored cars. A guy watches Barrett Jackson Auctions & sees a, no expense spared, all NOS parts, fully restored, 100 point, fully documented, 70 Hemi Cuda sell for, say, $300,000 (sold at a loss, btw). Now he thinks his, rusty, slant 6, plain Jane, 70 Cuda must be worth at least $30,000. I actually overheard a guy, in a restaurant, saying he watched a Hemi Challenger go for stupid money, at B J, & if he put a Hemi in his, it would be worth the same. It was all I could do, to not go "school" him, about the difference. He seemed like the kind of guy, that would have argued his point, ad infinitum.