Try using www.carsdirect.com and use the advanced search on used cars to see all cars across the country. If you are willing to get one with a few miles (generally less than 5K) there are some good deals.

Don't be fooled by some of the claims that they are SRT6 models. Check the pics. A lot of dealers are posting base and limited versions as SRT6s.

There are some great deals out there. That is how I got mine.