why not? You will be hard pressed to find a boat of that sort without a listing broker anyway. so you work with the listing broker who works for the seller and themselves. Or you sort your own buyer broker and they work for you and themselves. Unless you know the exact boat you are buying get a buyers broker.
In my opinion you absolutely must have a buyers broker. The listing broker is working for the seller. Unless you know all about the boat you are looking at the buyers broker will be there to help you with all of the minatuae and documents required for that type purchase. I used one for my boat purchase and everything went very smoothly. PM me for her name.