Any person or entity, including a person or entity purporting to be a broker or brokerage house, who acts as an intermediary or assists in the sale, sale on consignment, display for sale, purchase, trade, or transfer of a vessel, motorboat, or outboard motor in exchange for a fee, commission, or other consideration is considered to be engaged in the business of buying, selling, selling on consignment, displaying for sale, or exchanging a vessel for the purposes of this subchapter. Any person or entity, including a person or entity purporting to be a broker or brokerage house, engaged in any activity described above is subject to the provisions of this subchapter.