Can you look at the service records? Can you tell if its been painted(and if so why)?
Its not going to have had much done, except probably fluid changes, brakes, tires, some interior touch up. Invoices from the dealer should be around. Few shops had the Porsche CDs and manuals to work on 996. Have you lifted it up and looked under the car- were the pans flawless?
Its going to be a car that someone used and you will be able to see a little bit of how they treated it, eg, you can tell the difference between whethere it was a man or a woman.At that mileage - well