To answer your question with a question:
Would you buy a car you know to be troublesome just because it has a warranty? Do you want to repeatedly schedule a service appointment, shuffle your personal schedule and take it in?
A PPI isn't a guarantee that you won't have issues. What a PPI does is spot some very specific things
before the car is yours... and your problem. A factory warranty is not a CPO and isn't all-inclusive.
My recommendation is to do everything you can to insure the
used car you're buying has been properly manufactured, maintained and serviced before you buy it. This is what a PPI can do for you. It can also point out needed service items which you can use to better negotiate the price. If you can afford a late model Boxster, you can afford a PPI. Or are you
so rich that you can afford
not to have a PPI done?
