Friend of mine's dad saved money when he was young to buy his first car. He went to the bmw dealership and the guys said "but what are you doing here, you can never afford a car like this". So he never set foot in one again.
2 months ago he got a new car, Audi A5 3.0TDI full-option. Guess when you can buy that you still haven't got the money to buy a bimmer
Must say that I never had that experience with Audi or Nissan (well had other experiences with some Nissan dealers here, but that's a different story ). I was 22 when I bought my TT, it was summer and I went to the dealers wearing shorts, skateboarding-shoes and some heavy metal t-shirt. So either they didn't care or they where thinking "hmm, looks like a nerd, prolly works in ICT, so he ll have the cash"