3. 2013 Mercedes-Benz S 550 - 206.5-inches - $95,000
Just creeping in under the price ceiling, the Mercedes-Benz S 550 is another of the long-wheelbase luxury boats. Its base price is set so much higher than its competitors due to the lack of a 6-cylinder engine option offered on the long wheelbase editions. Maybe Mercedes should drop a diesel into this barge.