It all comes down to the dealer...when I bought my first m3 I was driving within 10 minutes with no issue. I was looking for an x5 for my wife at a different dealer (because mine didn't have a v8 to test drive) and they had no interest in even speaking to us (even though we rolled up in my e92). I'm 27 and am usually in jeans and tshirt...occasionally with a nice watch...I guess they could feel the competitors vibe off me