“Bluewald,” 1989, by Cady Nolan, is the top-selling work by a living woman artist. It sold for $9.8 million at auction in Spring 2015. If you think that's a lot, compare it to $58.4 million for a Jeff Koons.
Matthew Brady and other Civil War era photographers were using wet-plate collodion photography, which require doing their darkroom work in the field. Still, he managed to capture images that move us 150 years later, like this famous image of the Sunken Road (1862) from Antietam.