^ Yes! Quite a few years ago, was looking for a used car in the Seattle area. At the time my oldest was with a backroom internet hosting outfit for many of the big auto dealers. He said come down for the weekend, hang out and we will cruise around.Not really. In my view.
I bought a car in both 2015 and 2016 (used Saabs) and I was able to control the transaction to a remarkable extent. What I recommend is, strip out everything about the transaction that is not essential to taking title to the vehicle in question, other than a basic inspection and test drive. Knowing more about the vehicle than the sales goof is easy, IMO, and knowing which product to buy and from whom puts you in a position of dominance. I'm looking at Lonn and his spouse, buying one of these nice new Accords and right off, the dealer knows he's not dealing with fools. They just treat you differently if you're the boss, and not them.
Anyway, he had access to the dealer's inventory, that included their upfront/trade-in cost, service repair cost, what was done, etc. So, we cruised around in the evening/night look at specific ones that were of interest. And he on his laptop would pull up info on the spot. Then I went into the dealer in the morning to talk. Having a good idea of what they have in as their cost versus the sticker price. Then you figure in some dealer overhead, the sales commission and stuff. I don't mind folks staying in business and the sales needing to make a living, but I will not support a gang "R" of myself from a dealer, timewise nor $ wise. But it was eye opening about the profit margins that dealers/sales were trying to get...even on the financing end of the deals.
As for trade-in, I tell them that one of my kids are getting it. They don't even ask for the keys and I would not relinquish them anyway.
For many of my cars, I go kick the tires and drive. Then do a reasonable but somewhat lower offer. Most of the time I've walked out without the car and later the sales guy will call to ask if there is still interest. My general formula, figure out the sticker vs the estimated cost in for the dealer, and then offer a 33-40ish % of the difference. The upgrades/add-ons is a psych bs game, the dealer already has them in the car, they are not going to remove the upgrades...unless you are doing a production order.
As for bait and switch, I immediately walk away, no reason to be a victim and have my time wasted.