They are the Attessa IV, Lonian and Ramble On Rose, which are traveling without passengers, reported the marina management company (API). The 332 feet long Attessa IV is valued at $250 million USD, including its helicopter. The 87 meter long Lonian sleeps 12 guests in 6 rooms and is valued at $160 million USD. 60 meter long Ramble on Rose also sleeps 12 guests in 6 rooms and can be chartered for $375,000 a week. Any takers?