PPI from the sellers side

[kk2002s]

Ok, I did not have a PPI on my boxster but I did have one done on a car I was looking at for my daughter several years ago. It was a used car dealer, they let me drive it home to my local mechanic and I returned it a few hours later. It was a royal pain in the seat. I didn't buy as mechanic basically confirmed what I saw and felt, that the car was worn out and driven in a lot of salty winters.

Now as a private sale, what would I have to deal with as a seller to someone who wanted to have a PPI done on my car.

I don't think I'm going to let someone drive it to their mechanic and then have some unknown mechanic mess around with my car and the perspective buyer drives it back to me.

I don't particularly want to drive it to some unknown mechanic, they mess around with my car while I wait and then I drive home.

I understand the importance to many of a PPI but for a private sale I'm unclear how the seller assists in the process