You should always look over any car that you are thinking about buying, cuz after all YOU are the one that is going to be driving and taking care of it. Yea, look over everything in and out before you make any decisions, look under it to see if you see any signs of rust, i have seen numerous cars at dealerships that look like they have sat in water for a while. Also check the engine to make sure there is nothing wrong ect. Check the interior to make sure its in decent shape.
Best of luck man