Just bought a Boxster S, what should I know?

[Lucky]

Nice! Looks well optioned with litronics, uprated stereo, and some interior upgrades.

One warning with headers is some folks end up with CEL and emissions testing issues. I'd get a guarantee in writing from your tuner that he will correct any such issues and return the car to stock if he is unable to do so.

Overall the car looks to be in good shape with only the fabric top showing wear. You may want to look at a new top -- see the GAHH advert to the left of this page.

A few items not shown in the pictures, that you may want, are the mesh inserts for the rollbar hoops (further reduces air movement in the cabin), the spare tire cover and tie-down (bolt + wingnut + backing plate), and the tool kit (which may be behind/under your spare).

Enjoy the car. I know I find mine to be a blast to drive.