Call GS Marine in Corona, Greg Shoemaker is THE best all around boat expert. The rust on the prop and rudder is normal. Some guys spray a little clear polyurethane on them, but you have to be careful of the prop. It can throw it out of balance.
I actually went boat shopping for a friend yesterday and took a look at it. It didn't look bad at all. Probably the best boat there (Everything else was beat to $hit). The rigging looked fine. Biggest concern would be motor placement and v-drive placement to look out for. You may want to make a new thread asking if anyone knows this boat. I bet someone on here will chime in, we always do...lol.
Also, I couldn't tell if there was a cooling line going to the V-drive, if your going to be driving it a lot, you might want that. (When a v-drive has had large gears, they have to hog them out, eliminating the cooling ports.) Having the cooling will allow you to drive long distances, If not, you'll want to stop here and there and put a wet towel over it and let it cool down.
I did notice that it was a suicide pedal (down pedal only), you may want to think about putting an up pedal on it and probably a lockout if your going to ski.
If your going to be skiing, let me know, I think I have a clean ski tow for a flatty.
If you buy it, congratulations and welcome to probably one of the best ski boats ever. Its too rare that we see flats on the river anymore.
Don't knock the all white boats, my dad loved them that way...