You would have heard about Stratolaunch, the world's largest airplane; would you like to buy it if was for sale? Yes, it is up for sale and you can buy it if you have just $400 million. Vulcan is looking to sell off Stratolaunch for the hefty sum. For $400 million, the buyer will get not just the airplane but also the intellectual property & the facilities. Richard Branson, owner of Virgin Galactic is interested in buying it.