$18k can be a good deal, a bad deal, or somewhere in between.
It's a great price for an EXCELLENT '02. It's a BAD deal for an '02 in poor, or abused condition - not always visible.
NEVER buy a Boxster w/o spending at least $300 on a PPI from a dealer or independent who KNOWS what they are doing and looking at. Make a list of the things which need correction and their cost and use this to make the decision and/or negotiate the price of the car.
The old addage: "The most expensive Porsche to own is usually that one which was cheap to buy" should keep ringing in your head.
The world is FULL of used Boxsters. No need to settle for one which could run you into the Poor House.
Forget Carfax, usually nonsense.
Look for ownership history, service history backed up by receipts, and have the car looked at by an expert (PPI).
Weigh all of this and then take the plunge... or not.
Good Luck!
