I disagree with the Mustang, Challenger, and Camaro thing. These new versions will never become collectable. Thye make too many of them. Drive by any dealer and see the Challengers lined up in endless rows. All these remakes did was drive up values for originals. I know I would take an original 70 Challenger Hemi over that butchered Sedan based shit anyday.
As for BMW , I think one model that has obtained collector status is the bubble car. I seen two of them sell at BJ this past Jan. in the mid $40's. Looks like that car was a pretty smart investment to me. I wish I could go back and by a ton of them for the $600.00 bucks they cost when new.