Man claims he owns 84% of Facebook partly due to a $1,000 investment in 2003

Facebook Partnership Is Proven by $3,000 Check, Lawyer Says
http://www.bloomberg.com/news/2010-08-17/facebook-claimant-ceglia-says-he-has-copy-of-2003-check-to-mark-zuckerberg.html

Ceglia, 37, said in his June 30 lawsuit that he and Zuckerberg signed a “work for hire” contract in 2003, when the Facebook CEO was an 18-year-old Harvard University freshman. The agreement called for Zuckerberg to do computer coding work and provided for a $1,000 investment by Ceglia in a project called “The Face Book,” in exchange for a 50 percent stake, Ceglia claimed.

If it's true, that is possibly one of the the best $1,000 investments ever made. :)