I`m not sure if you are considering something a little older, like a 2001-2002? Have you considered the LS1 Fbodies (Z-28, Trans Am)? They should be right in your price range, and what is surprising is if you get them with the six-speed, 30 mpg on the highway shouldnt be too difficult, even with the basic bolt-on mods. Plus you will have 350+hp at your disposal. :-) My 2001 Firehawk has 425+hp at the crank (have cam and heads). My brother managed to get 28mpg combined on a 5 hour trip with it!