just my opinion, but that car from the performance shop is nice. For a weekend car 90k mi isn't bad, at least it wasn't rotting on it's tires and seals etc not being driven. I like the srt wheels and front end and the roadster bars looks pretty neat in the coupe; I have been thinking about that for my wife's car and I am glad I saw the pics; looks good to me.
I always do oil, transmission service, brakes, fuel filter replacement, coolant flush/fill and suspension inspection on any used car so I know what and when has been maintained. If the car is near you I think it's def worth the trip for a test drive; If it looks as good as the pics def worth it to me. Price isn't too bad but cash talks and I would offer closer to $7, but that's me. Good luck and keep us posted.

Tim