Coming out of retirement, and needing a daily driver in a hurry, a year ago I bought a '99 'S'. Ocean Blue, 80,000 miles, full history, good bodywork (just a few scuffs), four new P-Zero's (always a sign of an owner willing to maintain a car properly), recent clutch, 18" wheels. Interior not perfect, but pretty good - the car was infinitely better than the other one (I know - I was in a hurry) I saw which was £500 more. I paid £4500.
Downsides? Aircon rads crumbling so no air, rusted exhaust studs and broken brake pipe clips.
Car goes like stink, sounds awsome (no synthetic noise here...) and makes me smile every time I drive it - which is of course, every day.
Yes, I've spent money on servicing plus a MAF sensor and a coolant expansion tank, all with Porsche Bournemouth.
Running cost so far? About £1500 in a year which may sound a lot but I've done 19,000 miles in it and I am fully aware that they may be cheap to buy, but are not cheap to run. And of course, I could have saved a lot of money by doing the work myself, but I have neither the time nor the inclination.
Best of all, my contract finishes next week, so I'm keeping it because a) I don't need to sell it and b) I've always wanted (and now have) two Porsches!
Buy wisely but go for it - you will not regret it, they are the automotive bargain of the century!