Thanks for joining the forum, always look forward to other newbies like myself joining the family. Is this a private sale or from a dealer. Tell us a little more about the car, miles, color, mods, overall condition. Sounds like you already did some homework but if you haven't Mike has a great site
https://sites.google.com/site/mikefocke2/mikesporscheboxsterwebpages.
If you enjoy getting your hands dirty these cars are lot of fun and easy to work on. If you can get the service records it can help a lot, I knew when I got mine last Nov it had a good repair record.
The Box is a lot of fun to drive, once you get used to every ones unique noises, remember it is a convertible, you'll start feeling how great the handling is and how it seems to ride on rails.
Good luck and keep us posted.