PPI necessary when buying from a Porsche dealership?

[Laflamme02]

Thank you everyone, especially Perfectlap. I've read and bookmarked that article for future reference.
I've certainly been persuaded to get a PPI for this 2004 S 550 Spyder I'm interested in. I called around and found the closest local Porsche Indy shop.
Now, if only the sales rep would return my email...