Because part of the price of a work of art is its perceived historic / cultural importance. Autographs are taking this to the extreme, where only the mark of th

Because part of the price of a work of art is its perceived historic / cultural importance. Autographs are taking this to the extreme, where only the mark of the author exists, on its own, and still gets a high price. On the other end, fakes and very accurate reproductions, would never be as valued even if the effect as a visual piece is practically the same.