My brother-in-law had Memory Lane Motors in the Seattle area for 20 years. People who had spent a lot of money restoring their car and decided to sell would bring them in to see about selling on consignment. With parts, paint, tires and wheels, new upholstery, etc, it was very easy to have more in their car than the market would support.
I didn’t buy my car with investment in mind, I just wanted one, and when it comes times to sell I’ll get what I can. Mike