I just posted this at the other thread. You have a few other replies there, also.

Just went through the car buying event. Don't bother to use Delta Perks, USAA buying service, Edmunds or Consumer Reports. You can do better yourself. Just use them to determine your starting point before you begin to negotiate.

Check out Fighting Chance.com. It will show you how to get a much better price on your own from the comfort of your living room.

USAA had the best financing deal.