my '2' boys have/had ZERO interest in our old muscle cars- 1/2 dozen kids would walk up my driveway where there would be 2 superbirds, or a hemi bee or r/r or a 6pack, and maybe...maybe '1' of the kids would give it a 2nd look...i would guess the really rare/rare car will hold value, but in 10-15-20yrs the chance of a 71 hemi cuda 'vert getting today's or yesterday's $$$ ... doubtful...