I'm thinking of paying up to $12k for a used Z3; it's a car I've been looking at for a while now. But, I've heard that BMWs are really expensive to maintain (especially since I'll probably end up with a 96 or 97, so no warranties), so I'm having second thoughts. Can all you Z3 owners post your exeriences with your car, maybe pursuade me to go ahead or not buy the Z3?