$100 is a good price for this, they normally sell for $150 – $200. The Thule 753 roof rack designed for the 3 and 5 series, fits Z3 and M Coupes with just a small modification to the rear bar. The slot for adjusting the feet simply needs to be extended a small amount to allow the rack to fit the narrower roof line of the Z3/M Coupe. It’s very easy to do with a rotary tool, or angle grinder.