I fixed 2 old GCat 5.0 boats over the years where the beach rash was a problem. With the design of the hull, the bottom of the hull is a point, so the wear removes fiberglass to the point where the two halves come together(the keel) starts to separate. Sometime the wear will go all the way through, but mostly it flattens out the pointed keel. I filled with Marine tex the first time, and the 2nd time with thickened epoxy. I wouldn't worry about this as it is a simple repair, really no structural separation as there is a lot of glass on the bottom.
Now if it separated and had water in between the layers of glass then we have a different problem.
Its a sturdy boat with a lot of glass, if the price is right then go for it and don't worry too much.

And on the jib at the front, it does cross the front tramp, but no one will care. Pile on the bikinis and a big cooler and go for it.