Hmm I wonder what they will do with prices here in the UK. They are already too expensive, so that IIRC in excess of 40% of cars are registered to BMW first. The Z4 just shows that the market will buy their cars but only at the right price. A Z4M new at £44k has few buyers, yet the same car at 6 months old for £32k or less is relatively easy to sell. Likewise with the 3.0 coupe and roadster - plenty around for £8-10k under list at <12 months old. But if you bought new then it's a nightmare.
Unless they get their act together and sort out the residuals, then raising prices is a complete waste of time, over here anyway.