Buying a Boxster that jumped timing

[WhiteSmokeLS1]

Hi guys, I'm new the the Porsche world but no stranger to mechanics. I have a couple of highly modified Corvettes and engine and transmission builds are a breeze for me.
I recently ran across a '99 Boxster. The seller doesn't seem to know anything about the car and it was towed to a dealer where he was told it jumped timing. It's red with tan interior, 80k miles, auto, comes with hard and soft tops and he's asking 5500.

Here is my question, If the IMS bearing failed, and the valves bent, can i just replace a few parts, get the heads rebuilt and be good to go or is there something else that happens that I don't know about that takes out the whole engine? Basically, labor is free since I can do the work myself but I'm concerned about the cost of parts and exactly which parts are affected in this type of failure.