re: Scammed by auto dealership...What should I do?

Used cars have crappier rates than new cars....that being said, your responsibility to negotiate does not end when you go into the finance manager's office.

I always go to the dealer with approval for a loan through my bank, but I've killed a few deals outright because the finance manager offered what I consider offensive rates without even knowing my social, credit score, full name, etc. I make sure to let the salesman and his manager know why they lost the sale they just spent hours negotiating as I leave. You don't have to take their bullshite deals just because they offered it.