Damaged under the boat questions?????

Hello all,

I've been out of the game for awhile but today I was looking at buying a 2000 Xstar being sold by an individual. I looked at the boat a few days prior and made an offer on the boat pending a test ride.

Background
On the test ride (on a river) I was driving the boat down the center of the river and I hit something under the water with the Prop, shaft, guide, and rudder. We never saw anything and the depthfinder said the water was 27ft deep. The impact sounded pretty bad. Sounded like the boat hit something very solid. I ripped the throttle to idle and idled back knowing that it was best just to get it out of the water and see what's damaged.

The Damage
Prop=destroyed
Shaft=Unknown damage
Shaft Guide= Bent about 2-3 inches to the side.
Rudder/Hull=This is the tricky part. The rudder felt fine while still in the boat but after pulling the boat out of the water I noticed that the prop had somehow flexed and hit the back edge of the boat (if that makes since). I noticed one tiny (maybe 3/4 inch crack coming out of the fiberglass where the rudder attaches to the boat.


In the end I offered to pay the deductable but the owner said naw, how about we just split it. If it's fixed properly repaired I would still be interested in taking it home.

Questions

-Other than the obvious needed repairs visible on the outside, what are some other key areas of concern?

Tranny?
Engine?
Fiberglass integrity?
Etc?