[husker boxster]

IDK, this story gets fishier by the minute.

You don't sell a car throwing a cel. It's a massive red flag.

If the cel isn't serious / expensive, you fix it before you put it up for sale. Otherwise you come up with some story about probably just on O2 sensor or some $10 part, etc.

If he has a longtime Porsche mechanic on retainer, why didn't he have the cel fixed by the mechanic?

If this mechanic is his friend, do you think you'll get the truth from the mechanic?

It's fine if you want to have the mechanic put the car on the lift and let you look at it. But don't believe 50% of what he tells you and assume 45% of the rest is questionable. Don't consider this visit as a proper PPI. Someone not connected to the car needs to inspect it.

Take a step back and consider the thing I've just written. This transaction has the makings of a bad mistake.