I see this with familys that inherit this stuff when they go to sell all the time.The other end of it is that a number of years ago, a lot of owners who had retired with a good bit of avaiable cash built the car they wished they could have built when they were kids. Best of everything. They have a good bit of money in them. As they have gotten older or even departed, a lot of these cars are coming on the market with the owners thinking they have a gold bar they can sell. I have seen a couple of them, middle to late 90s builds, early 2000 builds, dated in some ways (autosound cassette radio for instance, lol). Nice, really nice, but dated. And they are just not bringing the money those owers are asking.
I think Robert Haas has it right.