This RCU classifed seller doesn't seem to have a clue...[&:]
http://www.rcuniverse.com/market/item.cfm?itemId=268687
(I don't want this post to look too stupid if someone gives him a "heads up" and he retitles his listing. This is a built Sea Cat, but he does not know what to call it.)
His asking price seems close to reasonable - if you happen to be in his area and could inspect and pick it up it in person.
Arlen