I wouldn't worry about it too much. I would have to agree with Bruce though regarding expectations. From my 2.5 years of ownership (pre-owned, now w/ over 60K and no PPI), I've had to fix quite a few things, but it comes with the territory of Porsche ownership and higher mileage. I've learned a great deal about my car and how to fix / maintain it w/c I have truly enjoyed. I have also come to appreciate what it means to get "bitten by the bug"....but, I do have to say that nothing beats the permagrin from driving one of these cars!
Just make sure you get a PPI!
Good luck!