I dont involved in the price side of things, but I can help with the what to look for
Check front tyres for wearing on the inner edge (they all do, so just keep an eye on them)
Rear tyres for any disfigurement
Rear anti-roll bar brackets can snap off the rear beam axle (not all connects have anti-roll bars

and the metal has been changed from 4mm to 5mm now

)
Engine oil leaks around sump/timing chain area
If the timing belt has been changed (150k/10years upto 04/2006 or 75k/10years after 04/2006)
Check the interior lights work properly and the 'lights on' buzzer works
Check for any vibrations when accelerating
Thats the main things I can think of, so good luck
