A 1-cent British Guiana stamp from 1856, once owned by a du Pont heir convicted of shooting an Olympic wrestler, may sell for $20 million at an auction taking place today. "Its first owner was a 12-year-old Scottish boy living in South America."

http://feeds.boingboing.net/~r/boingboing/iBag/~3/tKDrbNt7R14/old-one-cent-stamp-with-awesom.html