Take a look at this:
http://986forum.com/forums/general-discussions/14685-thinking-buying-boxster-must-read.html
Get a PPI
Plan on roughly $2000/year on maintenance, less if DIY
Yes, it is DIY friendly, especially if you hang out on this forum
Learning the search function will uncover a treasure trove of information.
They are great cars and reliable if taken care of. It sounds like you have found a well cared for car but still get an independent PPI, it might just save you money and headaches. Welcome to the forum
