When we buy from a dealership new or used, I get a written quote from the dealer, copy and paste it to every dealership in OK, KS, Missouri and where ever. Every one has an internet sales person.These are the reasons I don't go to dealerships. One time in my life have I bought from a car lot, although I've shopped 'em a few times. I NEVER tell them what I do and I don't put up with their bullspit, either. They start that chummy chummy crap or talking down to me (I would go in wearing plain old clothes, shorts and T-shirt), I just leave. It's not worth my time or BP to argue or fight.
I'm sure I'll do it again at some point some day, but I sure don't look forward to the experience.
I get quotes and use the lowest one to send out again to the other dealers. When they all start dropping out I know I've reached their sale point and seal the deal.
I walk into a dealership to spec out a vehicle with a printed copy, and walk out later down the road when the vehicle is ready to drive off the lot.
Make the car lots deal with each other not against the buyer.