Today, I walked into the dealership and opened with, "I have absolutely no ability to affect the price/financing or service and warranty contracts at all. I am simply here to decide which vehicle I want, with what features. Then MIT purchasing will contact you and do all negotiations. I get no input into that process at all. I just pick the car and then forward them to you."
With that on the table, it was a pleasure. They didn't bother with any theater; they didn't pester me with foolishness at all. They just showed me cars, and told me about them. I took them for test drives, asked about features, examined cargo space, and talked about what was physically available. The two times when the salesman went into some pre-programmed spiel with prices or financing terms in it, he remembered, cut himself off, apologized, and got back to showing me cars.
I wonder if there's a market in that. Professional car price negotiator. The car-wanter gets absolutely no look into it at all, and tells the salesman that his "buyer" will contact him once he has chosen a car. The negotiator gets the best deal he can *AFTER* all the options have been decided upon and there's no annoying "I'll throw in floor mats if you take the extended warranty..." nonsense making the whole price matrix 10-dimensional.
It certainly made the process nearly painless for me. A HUGE change from last time.