From Nature:
Why not buy some land on the Moon? There seems to be plenty available on the Internet, including plots going at a bargain £14.25 per acre (plus tax and fees) from the Lunar Embassy, the company selling the ‘property’ of American entrepreneur Dennis Hope, who infamously claimed practically all of the Solar System in 1980 because no one else had.
No one has officially recognized that Hope’s lunar ‘deeds’ are anything more than novelty gifts. But more than 2 million have been sold since the 1980s, says the company, generating sales of millions of dollars out of empty space, leaving experts to wonder whether the commercial opportunities on the Moon might someday lead to real sales; and to suggest that perhaps they should.
More here.