5. Boeing 747-430 owned by Sultan of Brunei – $233 million

The Brunei Sultan is regarded as the world’s richest monarch. The Sultan, therefore, spared no cost for himself and his entourage to buy and equip a private jet. Indeed, his majesty paid at least $100 million through Lufthansa for the purchase of a Boeing 747-430. Afterward, he spent another $120 million to Customize the aircraft with the Royal Style interior – including solid gold and Lalique crystal washbasins. The Boeing 747-430 is a Boeing custom jet specially designed for the sultan. With a price tag of $233 million, the jet is a modified Boeing 747 with almost everything plated in gold. The interior is as big as a house, with a living room, a dormitory, a private bathroom, etc. Each of the several bathrooms features a solid gold washbasin that completes the luxurious pleasure.