Art and commerce have always intersected in uncomfortable ways. The difficulty of correctly appraising the quality of a work of art in the moment combined with the near-impossibility of putting a dollar value on the types of things that art provides have led to a strange patchwork of financial realities for artists and writers throughout history, from the patronage system of the Renaissance to the writerly financial refuge of the modern university creative writing department. In all this time there have been some particularly notable failures at correctly giving a work its monetary value. Just ask John Milton.