LunarLand has been selling deeds to acreage on the moon since 1980. According to their website, The UN Outer Space Treaty of 1967 prevents any government from owning extraterrestrial land but allows individuals and companies to claim land the way that early US settlers did. Whether or not your Moon Deed will hold up in lunar court is another question. It certainly makes a memorable white elephant gift and will likely be traded multiple times. Lunar land is available in packages of 1-100 acres. The company also sells deeds for land on Mars, Mercury, Venus, and Jupiter’s IO moon.