the specification does look pretty good, I work on plenty of these so in regards to the areo kit I'd want to check its been fitted properly, its barely 15 minutes to remove a bumper from a 911, Boxster or a Cayman and just as easy to put back on again so there's no excuse for any screws/clips missing.
Otherwise, Porsche's wear miles extremely well as long as its been serviced regularly and to a good standard, so if this had been done the mileage shouldn't be any issue, obviously this ones averaged a bit over 8000 miles a year so hardly outrageous.
Its tricky to tell too much without actually seeing it so as long as everything is honest and checks out, whats not to like?
These cars are durable, a good one will be happy to potter through town, take a turn at a race track or tour long distances swiftly and comfortably, you can leave it outside in the rain and still expect it to work in the morning. So don't listen to anyone trying to tell you otherwise!