Window regulators, RSi's have electric windows; any slowness, gritty sounds or whining could tell you they are on the way out (not cheap)
Juddering brakes when slowing at low speed (when they shouldn't) is ABS activating, slightly alarming when it happens (not a big prob though and doesn't effect braking distance): ABS sensor rings have gone on drive shafts (can be replaced without changing the drive shafts)
Cambelt is 72k or 5 years (best to have it done before this)
You want a full servive history really, with plenty of other history and pref. the receipts for the work.
Check AC works and all the electrics work. Make sure you get both keys and have the locking wheel nut key.