Well, I don’t think it’s as effective as it used to be.
Mainly because a lot of dealers would prefer that you finance the vehicle through them – then they make a profit on both the sale and the financed payments.
Cash is a little bit better than checks or credit cards, because those cost the dealer in fees or reserve for bad checks.
The main advantage of this technique seems to be a psychological one – the salesman sees that bundle of cash right there on his desk, starts to think about part of that being his commission, … That’s part of the reason the salesman will ‘have to get approval from his manager’ – the manager doesn’t see the bundle of cash in front of him, and is less influenced by it.
I don’t necessarily disagree with anything you said. My points were that even if you do your homework and get a bottom-line out the door price over the internet, they still can’t give you a firm price on your trade-in without seeing the vehicle. And while, they sometimes aren’t out simply to screw you, they will try to make up whatever profits they lost by low balling your trade-in. (See the interior is worn, hair line cracks in the dash, etc.) The trade in that you rated as “good” and worth $3700, they rate as “below average” and offer $1150. The last time I bought a car, after several hours of negotiating the trade in price, the paperwork came back with a $300 “reconditioning fee” on my trade-in. They said it was standard and non-waiveable. I asked for my keys back, and the salesperson came back and said that his manager agreed to knock it down to $100 and surely I wouldn’t walk over $100 on this deal. I said I would and made it to the car before the salesperson came to my window and agreed to take the final $100 off.
So you are now doing the same dance that you used to do, now only on the trade-in side. Sure, you can walk if they do this, but you’ve already seen the shiny new car, they’ve got your old keys, etc. Basically the same as pre-internet days.