Usual stuff.. bodywork, rust etc.. they don't seem to suffer at all as a rule. If you spot *any* rust, I'd look closer, as it could very well be accident damage. The electrics are pretty good as rule too.

Check front fogs are working, not cheap to mess with
Front shocks and sometimes strut tops have a somewhat limited lifespan
Clocking, as there's so few with low miles
Clutch takes a bit of pain
Headgasket, If it's done 90k it's guaranteed to have had at least one
Beware of normal models being passed off as Highlines, the highlines are 96 on and get coilpacks, as an easy way to spot.
ummm brakes and suspension full stop really, especially at the front take a battering,.
They run quite hot, and should sit bang on 90 degrees very quickly, I've seen some sit at indicated 95, but no more than that.
Check the back wiper motor works, and don't be surprised if it won't turn off once activated. They don't.
Full Service History helps. A lot.
Edit : And the ABS is a bit of a pain sometimes. If the light on the dash doesn't go off within about 5 seconds, quietly check round the car and see if there's a sensor connector (located on the strut) has been crushed, that happens a fair bit when somebody's been messing. *might* be the cause.