The Rhine river by German artist Andreas Gursky. Titled Rhein II, was sold for $4.3m (£2.7m).
Edward Steichen's The Pond-Moonlight (1904) sold for $2,928,000 in 2006.
Unknown photographer, Billy the Kid (1879–80) sold for $2,300,000, June 2011.
Edward Weston's Nautilus (1927) sold for for $1,082,500 in 2010.
Alfred Stieglitz's Georgia O'Keeffe (Hands) (1919) sold for $1,470,000 in 2006.
Richard Avedon's photo Dovima with Elephants (1955) sold for $1,151,976 in 2010.
Eugène Atget's Joueur d'Orgue (1898-1899) sold for $6,86,500 in 2010.
Ansel Adams, Moonrise, Hernandez, New Mexico (1948) sold for $609,600 in 2006.
These are the most expensive photographs of the world ever sold. Making money from photography isn't that difficult though. However, you need to put more efforts to shoot the best photographs.