400 half inch Osmotic Blisters
I agree with Jeff H. Two inch blisters are huge, and 400-500 blisters is a widespread problem. You can buy a Catalina or other boat that does not have such a problem. The present owner has a boat with a serious problem. Why should you take on his problem, unless he either fixes the problem before the sale, or reduces his price enough to justify you in taking on his problem? Nobody likes a bargain more than I, but, as Jeff H. suggests, I would run from this one. If all you do is repair the big blisters, and then you want to sell the boat later, you are going to have a very hard time selling it at anywhere near market value with 400-500 osmotic blisters.