For anyone interested in a behind the scenes look at how dealerships operate, I would highly recommend checking out Don’t Get Taken Every Time by Remar Sutton. He is a former car dealer and takes you thru scenarios how they work to get your last nickel out of your pocket.
Sample: salesman says we can sell you this car for 35k, and you offer 30. “I’ll take this to manager”. Quite likely they go grab a coke and don’t go near management while you and SO discuss things in their office which is very likely BUGGED. So if you are in salesman’s office and want/need to discuss financial matters, text each other.