Boats, Trains and Airplanes (etc) all have let's say a "unique" pricing structure. TB is right on - there are plenty of surplus marine equipment houses around-give it a whirl on Google and you'll be amazed.
Some of the pricing is acceptable and some is just plain ridiculous, liability or not.
What kind of boat did you end up getting?
Opportunity is missed by most people because it is dressed in overalls and looks like work.