I have no idea, every time I see used boats posted for sale online the asking prices seem crazy to me. Yours seems reasonable so it may be too low.
I think a lot of the time people have financed the boat for 12 or more years and then when they decide to sell it 5 or so years later they just try to get what they owe on it but with it having been financed for such a long term they've barely paid down the principle and have to ask for something close to what they paid for it new.
I got 350 heads on a 305 engine.
I get 6 miles to the gallon.
I aint got no good intentions.