A Buddy and I were having this discussion the other day concerning used boats from 2004 and newer ...… I understand that in 04' the epa required some different blend / mixture with gel cote- and the water between bunks and hulls and this required gel mixture has resulted in blisters bubbles on these year boats......unless you lift the boat a potential buyer could be buying a damaged blistered hull- I bet there is a ton of boats out there where neither party knows about it- maybe its just safer to buy a 90's model boat. heard the repairs on these blisters costs thousands to repair and not covered by insurance...…:(