Almost nobody buys a boat the way they buy a car. The search starts with a hull and an engine package, not a dealer: someone types a make and a length, reads owner threads for a season, then narrows to the two or three dealers within towing distance who actually stock it. By the time a phone rings, the buyer knows the model year differences better than most salespeople, and the only open question is condition, trade allowance and how soon a sea trial can happen.
The listing aggregators are the real competitor for that search, not the marina down the creek. Boat Trader and YachtWorld carry your brokerage inventory, rank above your own detail pages for the exact model, and hand you a lead with the buyer already comparing four other boats. That is fine as a channel and terrible as a dependency. The pages that pull a buyer directly are the ones the aggregators cannot reproduce: your service department, your haul-out capacity, your dealer authorizations and the story of who has been rebuilding outdrives on that river since before the buyer was boating.
Then there is the second business, which is the one that pays through the winter. Slips, dry stack, storage, winterization and spring commissioning run on a calendar that has nothing to do with the sales cycle, and the searches shift with it: slip availability and waitlist questions in late winter, bottom paint and repower in spring, shrink wrap and haul-out from the first cold snap. A campaign that only chases boat sales goes quiet exactly when your yard is at capacity and your best margin work is being booked by someone else.