Well.. in 2006 my 2000 boxster had 4 owners. .Remember back in the late "go go"90's/ealry 2000's, short leases were quite common.. Money was cheap and easy.. not really suprised. I imagine the last few owners were trying to "make a cheap buck" by buying at "depressed" prices (remember the credit crunch of 2008?)
Downside is there is likely no real "history" to go with the car. imho, with "no history" comes lower pricing and a need to catch up on deferred maintenance.
Not sure how much faith I'd put in a carfax report as the info is culled from various databases. All it takes is someone with thick fingers to type in a wrong number once.. then its an "issue" the rest of the cars life? cmon.
Truly check to see if the vehicles condition is commesurate with its odometer. Take a PPI to the shop that isn't the owners friend, if you have a choice. Too much conflict of interest.
be sure to read up on the issues the "early" or 3.4l cars have.