Of the five cars Autoweek reports price declines, four are American and three are old old. The fourth American car, the Jeep CJ-7, is essentially a 1940's design. Here's their list:
1. 1946 – 1952 Hudson Commodore (-36 percent)
2. 1968 – 1975 BMW 2002 (-33 percent)
3. 1976 – 1986 American Motors CJ-7 (-32 percent)
4. 1957 – 1958 Studebaker Golden Hawk (-30 percent)
5. 1955 – 1957 Chevrolet 150 (-27 percent)
I believe that 1940's and 1950's cars are decreasing in popularity as the people who remember them are retiring from the car hobby. But including the BMW 2002 on that list is just silly - perhaps in another 20 years, but not today.
I suspect that the Auctions (with a capital "A" as HB Chris characterizes them) were too busy selling multi-million dollar Ferraris in 2015 to bother with 2002's.