The standard rule of thumb with Porsche's is purchase the best/cleanest you can find/afford. And I would NEVER purchase a Porsche or any high end car without a PPI being performed by someone that knows the car make/model you are looking at. I've had the pleasure of owning four Porsche's and I'm getting my fifth in February. I followed my own advice on all except one..........it bit me in the butt
Make the purchase decision with your head/facts not just pure emotion
Plenty of good ones out there you don't have to buy the first one. Good luck in your search.