[Perfectlap]

IMS is not the issue. That can be done preemptively for as little as $1,000 if using the Pelican bearing.

The bigger issue is that you're shopping for a Porsche that's potentially walking into its first big wave of major maintenance. That ran me close to $10K, granted my car was 10 years old at that point.

My advice is to go in after 20K miles and get out by 70K if you plan only to own the car for the short term. If you're looking at 5 years or more of ownership, it will get expensive at some point. Thus, a car with 70K miles or more, needs to have a substantial list of repairs like shocks and control arms (if you plan to drive it daily over rough roads), clutch/ims, maybe water pump, AOS, coolant tank, and a few things that can go without warning.

A 70K mile car that "has needed nothing" is a car you'll be making expensive repairs to.

p.s.
when you get the pre purchase inspection done, make sure it includes a leak down test.