How would you like to buy Richard Petty's prototype 2009 Challenger SRT? It will only set you back $175K. 2009 Dodge Challenger SRT-8, $175,000 - Cars.com
It would be a nice ride to have but I think part of having a "modded" muscle car is doing the work (or at least the planning and having the say as to what is to be done) yourself.