If you have an Executive Costco membership card (cost $100 for 1 yr.) you can buy most cars at invoice from participating dealers. Cars in demand are call "premium" cars and are sold for invoice plus $500+.
I am going to try this with the Challenger and see what kind of a deal I can get. Has anyone tried this with another car purchase?
(Also, with the card, you get lower financing rates from Capital One).