If you want an srt6 I would say buy it from the US and import it and save a ton of money.
One thing to look for is to see it the car was in an accident. Other than that it is just minor do it your self stuff that is usually broken or need a little touch up. My car had 180,000KM on the original drivetrain and it was still running strong when it was taken out of the car. I drove it to Wisconsin from Niagara Falls, Ontario for its last journy problem free.