I live in the Bay Area as well. For PPI, it stands for pre-purchased inspection (or something very close to that
Depends on where you go (Porsche dealer, independent Porsche shop, gas station, etc.), I would say the price would be somewhere between the $100-$200 range. I had my 1991 964 PPI done in Rector Motors Porsche, Burlingame, couple years ago, and they charged me $180.
If you are trying to purchase a car from a seller, I might suggest to have the PPI done in a Porsche dealer (e.g. Anderson-Behel-Stevens Creek Porsche, Claridges Porsche in Fremont). It is because there will be less argument for the seller to argue with, if there are any "previously-unknown" problems found in the car during the PPI.
However, I also use an independent Porsche shop (www.heyerperformance.com
) in Mountain View. It is a reputable shop for local Porsche owners. They can also do an excellent job for the PPI.
With best regards,