Comment These "vending machines" already exist, in a way (Score 1) 99
My wife and I just bought a used current-year model from Enterprise, the rental car people, and did most of the work at home on my computer. Found the models we were interested in, the price and mileage, and then went to the dealership, about a mile from home. And they were willing to go to other Enterprise dealers, 20-30 miles from here, at no charge, to get a model for me to look at, with no pressure on me to buy it once I'd seen it. They had many models to choose from, and there was no pressure to buy. And they have the same 7-day return policy. If you don't need a brand new car, this is the way to shop! We had the car at home less than 6 hours after we first left to shop.