Emily L. Ferguson writes: Value is measured by earning levels in the US, and in many other cultures. The less you earn, the less valuable you are. The less your photographs earn, the less they're worth. -- I was going to cite the story I heard about how little Weston charged per print here http://photo.net/philosophy-of-photography-forum/00DmU6 yet his images are highly prized today, and subsequently the monetary value has increased over time.