That's a great deal. Now that you have bought it, I still recommend getting a PPI so that you know what you are in for. The shop can identify where the oil leak is from (many possible sources).
Enjoy your Brand New (to you) Porsche! Be sure and join PCA, it's pretty cheap and you get a fantastic monthly magazine, along with numerous discounts. Pelican Parts is a great source for parts and info (ECS Tuning is also good), and you get a one-time 10% discount annually with your PCA membership. Figure out what all you need for the car, and the discount will more than pay for the PCA membership. My local PCA chapter also puts out a decent little monthly magazine, and they have all kinds of activities like group drives, social events, car shows, and "tech events" where they bring a famous Porsche race driver to give a talk, along with having a car that they drove back in the day. The last one was Brian Redman and they had a 917 (they actually drove it from the shop where it's kept to where the event was held, a few blocks away. You could hear it coming, it was extremely cool!). Pretty much every person I've met at a PCA event has been very nice and down-to-earth (although most of them have a lot more money than me).
My local PCA chapter has autocrosses, and they are great. Everyone there is a gear-head, and many have the attitude that they can't believe they have such a cool car (myself included). It's a cool group of like-minded people who appreciate their cars for what they are, and aren't into it because the car is a status symbol or the equivalent of automotive jewelry. The best part is that when someone asks how you did at the autocross, you can tell them that the only cars that beat you were Porsches.
If you have to rebuild the suspension, you might consider going the ROW (rest of world) sport suspension. I put Bilstein B6 shocks and the Porsche ROW sports springs on it, and it drove great. It was a little stiff on the street, but the handling is terrific. Even with the stock sway bars, it worked great on track with very neutral, balanced handling. You'll probably have to replace all the other suspension parts, too. When I got my Boxster, it rattled, creaked, and groaned so much it was difficult to have a conversation in the car while driving, even though I thought it drove great. The transformation was unreal, suddenly it was like a regular, quiet car that was fantastic to drive.
One of the best things about the Boxster is that they sound really cool, the flat six howl is wonderful. You can remove the intake snout on the driver's side of the car (instructions on YouTube) and you will get the intake howl to enjoy. My Cayman is much quieter with the engine noise, and I miss that part of the Boxster.