I would also say to look at the overall condition of the interior as well.

This normally gives you a good clue as to how well a car has been treated otherwise.

A clean car on the inside, and I mean a lack of scratches, broken plastics and holes drilled everywhere, will normally give you the idea that the original owner has cared for the car, and if they care for the inside, they most probably care for the outside and mechanicals.

I filthy interior with no respect for the fixed items like the dash, and rooflinings doesn't necessarily mean that the mechanics haven't been looked after, but gives you an indication of the original owner's idea of looking after valuable items.