in a car like this crucial to check things properly of course. body panel gaps make sure there all even, and any other acident damage all he usual second hand car checklist. im no epert on the is but do your research and for peace of mind take a rac inspector with you or a mechanic. a good thing would be to see if the mpg is about right, open the bonet when starting the car cold thats listein for any dodgy noises. one of the best things to do. is test drive two cars that way you can tell a diiference between the two. like is said im no expert on the is but all the usual checks and you should be fine.
hope this helps pas