The last time I went to buy a car, I had the same thing happened to me. I finally said I'm about to spend $50,000. I need to talk to someone that can make the decisions. I was already annoyed, so I ended up walking out and I went to a BMW dealership. There I walked around in the showroom and just a couple of salesmen said hello to me. I then went out to the lot to look at the cars and see what they had. A salesman came out to meet me and handed me the keys to the car I had been looking at the longest and said take it for the weekend. I said the whole weekend he said, "Yeah, bring it back on Monday." I asked him if at the least he needed a copy of my driver's license and he said oh yeah, sure. He hadn't even asked me for identification.
I ended up buying the car on Monday.