Before jumping in, I would highly recommend you spend hours and days reading the posts on this website, as well as some others (
www.renntech.org for example). There many items to be aware of before becomming an owner, just as with any major purchase. These are wonderful driver's cars, unlike most others on the road. But with most anything, they are not faultless. Always buy the newest and best example you can afford. Don't spend every last dime on the car, because any will need maintenance or repairs. Some prefer the newer 987 over the 986...I personally like my '02 S.
An educated buyer has the best advantage in this market; there are lots of cars available, so be very choosey.