The tintype photograph of outlaw and killer Billy the Kid sold for $2.3 million to a millionaire who plans to enjoy owning it and lending it to a few museums for display. The picture is the only one known to be an authentic photo of Billy the Kid. It was probably taken in New Mexico. Billy the Kid is said to have murdered at least 21 people and was sentenced to hang for the 1878 murder of a sheriff. He escaped and was killed by Sheriff Pat Garrett on July 14, 1881. Tintypes made a mirror image, so the auctioned photo shows what seems to be a left-handed man (he wasn't). The picture was reportedly given to Dan Dedrick by Billy and has been in Dedrick's family ever since. The new owner, William Koch, is a member of a well-known family of billionaires who made money from oil and gas.

Photo: Twenty-Second Annual Old West Show & Auction, denveroldwest.com