Well, I came across:
http://www.planetaryinvestments.com/
and for a mere$29.95 you can OWN an acre of land on the MOON.......
PLUSSSSSSS!!!! The mineral rights down to 3 kilometres.
I was NEARLY speechless

Soon, there will also be opportunities to purchase bits of Mars, Venus and Io.
I still can't wrap my brain around it - how do people think of stuff like this. What would the legal implications be in the future if mankind really ever did start colonnising any of these planets??