There are basically zero on the great lakes. The ones that are priced right go in a day or two. A few are over priced or have I/Os.I haven't looked lately, but I would guess there are a TON of 330's on the market around the Great Lakes. I would start to look on Yacht World to see what's available before I'd get too interested in the boat you're looking at.
Rule #1 in boat buying--don't let your emotions get you into a boat that is going to cost you a ton of money to make it right.
Find a boat that has fewer deficiencies.