[thstone]

Do they blow up even after doing 79k miles over a period of 14 years or does this make for a safe bet?Yes, the engine could blow up. The probability is low but greater than zero.

Will a PPI give any advanced notification or probability of the occurrence of the common faults? A good PPI can tell you the current status of most, but not all, of the critical components.

On the good side, if the engine lasted 79,000 miles it will probably last quite a bit longer. But there are no guarentees.

Plan on spending $2,000 per year on repairs and maintanence.

There are no cheap Porsche's (regardless of the purchase price).