Without a doubt, VHF marine radios are one of the most essential pieces of safety equipment to be found on a boat. No boat should leave the shore without having at least one on board, as in the event of an emergency VHF marine radios are often the only way of getting in touch with the people who can rescue you. Therefore, although recreational boats less than 65.6 feet in length are not required by law to have VHF marine radios onboard, they definitely should anyway.
Online bartering has been going on for at least ten years. High profile websites that feature the service have been online for at least five years; a little surfing reveals that they are going through a process of consolidation and realignment.