The man's name is Dennis Hope, and he's a prime example of someone who has the whole thinking-outside-the-box thing down to a science. You wouldn't assume that you'd be able to sell pieces of land from distant planets, but you would ultimately assume wrong.
Hope, founder of the Galactic Government, claims to sell pieces of land on the moon, Mars, Mercury, and the entirety of Pluto, among other extraterrestrial sites. How has he been doing this for over three decades? In 1980, Hope sent a declaration of ownership to the United Nations that pointed out a supposed loophole present in the 1967 United Nations Outer Space Treaty. The treaty effectively forbid any country from owning planets, but Hope claimed that it never stated that individuals weren’t also eligible to own planets too. Fast forward to today, and Hope has been in business for over 30 years.
Spoiler alert: The U.N. never replied to Hope, and a space law expert says that the treaty does indeed apply to citizens.