PPI if buying from dealer?

[BeenThere]

Sorry if my first post is in the wrong place or old subject. I did search some on PPI but didn't see what I was looking for.

What do you do about a PPI when buying from a Porsche dealer? They would have already completed a pre sale inspection and it seems they would have corrected or noted any obvious problems at that time. Do you still tell them you want a PPI, maybe specifying what you want them to inspect? Do you take it somewhere else for a PPI?

Currently looking at a couple of 2003 S models at a couple of different Porsche dealers.

Thanks,
Norm