@qvc chick The last time I bought a new car I went to only one dealership. I selected the model that interested me based on Consumer Reports magazine, test drove the car, fortunately liked it and asked some questions about the car and add-on options. To decrease the usual dealer stall time, I simply said that I had to leave in ten minutes for an important appt. and to give me their best bottom line price or to phone me with it later. I did not tell them that I was paying cash but I did tell them that I would be getting other quotes. Subsequently, I called all dealers within an hour or two driving range from my home, asking for their best price and telling them that I was also calling their competitors. Only a few refused to give a price on the phone. I sold my very old car through an ad rather than do a trade-in. I have also donated cars for the tax deduction, more satisfying and more profitable than accepting the trade-in value. I am still happily driving that "no problems ever" 2009 car. Friends have bought low-mileage used cars from Enterprise and been pleased with the cars and the price.
I actually read a short book about car buying before buying that car and was well aware of what constituted the lowest reasonable profit margin for the dealer. In the end, I was glad to pay the dealer a reasonable profit -- but no more, especially since their sales time had all been on the phone. I saved time and a huge amount of money over the quote from the one dealership that I visited. That book is likely out-dated but similar books (or reputable online resources) are probably available. It was well worth my time to do that homework for such a large purchase. I also have a low tolerance for dealerships, but they are a necessity for a test drive.
Years ago, I went to a car dealership with a male friend and, although it was clear that I alone was the purchaser, they spoke only to him and ignored female me. Of course, I did not buy the car from them and subsequently let them know why. Hope that would not happen in today's world!