Just an update on this thread if anyone cares. We bought a used car recently and I would say it was a fantastic deal. I got them to drop the price $2500 and throw in a 100k warranty for free. Paid $2k under what Edmunds and kbb said was the average price.
At first they wouldn't budge on price. But as everyone says, your greatest power is walking away. I reminded myself this and we started walking. Got to the door and the manager came begging to sell us the car. I told him my price and pointed out how many of this car was out there (within 20 miles nonetheless) for the same asking price and that I was confident that someone would be willing to work a deal with me. I stared silently at him until he spoke. He countered, I reminded him he has another identical car on the lot that had already sat for 90 days so it would make sense that this one would too, I was there to take it off his hands. He finally threw out a good number and added warranty. Sold! Not going to lie, it was pretty fun.
My advice to others after my only dealer purchase, specifically used. Come armed to the teeth with knowledge. Know what the next closest dealers are selling the same car for and how many there are, this will tell you truly that if the first deal doesn't work, there is another car down the road. Don't be afraid to remind salesmen this. Know what other similar models they have on their own lot. Pick an amount you want to pay and get it. I was hesitant to throw out such a low number because I had heard some dealers will just laugh at you, no reason not to try, there's another dealer down the road with the same car.
Anyhow, this kind of just verifies all the info out there, it does help you get a good deal. Good luck to anyone else out there doing the same task.