When talking about private jets, they are luxurious aircraft that belong to the wealthiest people in the world. Such planes cannot only fly but be state-of-the-art executive planes that offer new levels of luxury, technology, and performance. These days, the most expensive and well-designed private jets are produced by such manufacturers as Gulfstream, Embraer, Bombardier, and other. They convert commercial aircraft into opulent flying palaces that look extremely impressive. So, who owns the most expensive jet in the world and how much does it cost?