to look out for body work wise, is

rusty battery tray, rusty rear chassis rails, rust bubbles around the sunroof, plus genral rust areas as per normal car.

and if you want to make sure the engins sound, them listen very hard to the gearbox, any slight wine and be perpared for a new box in the future, look for turbo smoke, any smoke and it could be new turbo. check for head gasket blown in the normal ways. only buy one thats got history or paper work with it as well. you need to know something about the car.

also check the vin number, make sure its not a re-shelled RS in a XR shell. not sure what the vin number spose to start with now, but somone on here will know.