The BMW M Roadster is BMW's M performance model of the BMW Z3 and BMW Z4 convertibles.
Maximum # of Registrations = 639
Latest # of Registrations = 387
Its got an M in front of it so its gonna be popular. Z3's definitley going up. The Z4 is trickier as prices are still age related but hard to see early one selling for much less than a Z3 so its looking like they maybe bottoming out as far as price is concerned.