Thinking of picking up this Boxster S this weekend. need input

[ASpec818]

I've been looking for a yellow boxster s for a while and I found a 2000 w/ 70k miles. He's asking $14k but there are two caveats. One is there is a tear in the rear window. I was reading the forums and it'll cost around $500 to replace the window. Second thing is he mentioned that the car hasn't been serviced in a while because it's been stored but it runs really good. I'm thinking it'll need a full tuneup once I pick it up. Looking around, it seems like that'll run about $800 or so. Now I'm going to definetely use that to negotiate the pricing. Is there anything else I should lookout for or check? Thanks!