Good look with the search.
Some 2003 / 2004 models will still have the old style jet fitted so worth while checking if the timing chain has been changed. A good servive history is a start dont worry if it isnt at the stealership.
Check for smoke on cold start up.
Thats all i can think of really. Apart from the normal stuff, MOT , HPI , Tyres , Brakes exhaust body panels that dont line up etc.