Everyone thinks the Z3 Coupe is very rare, and if anything were to become classic that would be it. However, everywhere else in the world the Z3 Coupe far outsells the M Coupe. Thats because the M Coupe costs like $75000 with the Euro motor. I would think that if there were to become a rare collecters item, it would be the current euro M Coupe. Sure it would be difficult and expensive to get one in america, but if you did it would very rare. It has all the ingredients to make it desireable later on. Its got a powerful motor that is largly hand built with 6 individual throttle bodies. Also, it would only have that short 2.5 year production of the Z3 but be rare on a world wide level.