The most expensive photograph ever sold was made by Andreas Gursky, a german visual artist. The photograph was sold in 2011 for $4.3 million. The photograph was produced as the second (and largest) of a set of six depicting the River Rhine. In the image, the Rhine flows horizontally across the field of view, between green fields, under an overcast sky.
What do you think? You would pay that much money for a print? It's not like in painting...In photography it's only a print so you can make 1000 almost identical prints. If you would print it on canvas from the internet and put it in an art gallery who will notice that that is not the original print sold for $4.3 million?
Rhein II by Andreas Gursky