Originally Posted by dmhenderson

1) Go to USAA's car buying service and get their guaranteed price which is usually awesome.

2) Use the Carfax thing that shows you what everyone in your zip code paid for the same car. If the USAA price is lower than the Carfax price, you're good. If not, look elsewhere.

I actually walked into a dealership when I was buying my 09' Z and had them refuse to give me the USAA price so I walked out and reported them to USAA. Every other time I've used the service, it has worked like a charm.