Purchase opinions

[Maexle]

Hi, I am a Newbie to this Forum from Indianapolis (since 7 yrs now, actually from Germany, Stuttgart Area....).

I am looking to buy another car for my wife and stumbled over a Porsche Boxster on CL. After digging around on the Internet like CL, Autotrader...etc.... i started really liking this car.

I have found one here at a small Dealership and we took it out for s test drive today, here are the specs:

2001 Porsche Boxster "Basic" (not "S"),
49k miles,
Silver,
Black Interior,
Tip shift (Automatic)
great condition,
when apply pressure to the brake pedal i can feel a little shake,
Dealer asked 12990, i talked him down to 11.5k (mentioning the IMS issue).

The plan is that we get the car and replace the IMS myself (i would spend 1k to gly over my friend from Germany who works as Mercedes service engineer and is absolutely talented with cars and a friend of his is working as a Porsche Service technician).

SO now to my question:

Is this a good deal ?
Anything i have to pay close attention to at the second inspection ?

Any comment / input is welcome.

Thanks and Hello from Indianapolis.