[Perfectlap]

For a Porsche with more than 50k miles, lean towards the one that has had the most standard repairs-- clutch/IMS, shocks, water pump and or coolant tank, rotors, AOS. Nearly all of these are over $1000 repairs with a cheaper than the dealer independent Porsche specialist. At the dealer these repairs would easily cost you an eye or hand. And these repairs are common below 100k miles. I took my car to the dealer for a top to bottom diagnostic at 60k miles and the service manager gave me an estimate that we both knew was comical. He didn't even try to book me on coming for any of the work. but $120 fee to check everything "by the book" was well worth it as I knew they would try and get me to fix anything that was remotely fixable to drive up the bill.

P.s.
For the asking prices on those three, they need to be providing you with receipts of ALL the aforementioned work or the mileage absolutely needs to be well under 40k. I love these guys who do no major maintenance on their cars and then ask maximum asking price. But that's the danger of being an uninformed buyer. also without PPI the condition is a question mark, don't be fooled by shiny paint and a clean interior. My car was spotless before the $12000 in repairs required between 60-80k miles. And without the estimate of discovered repairs in addition to likely repairs (known Boxster weak spots) you have no way of arriving at what is fair or above market.