John Wilkes Booth, the 26 year-old actor and later assassin of President Lincoln, was photographed many times over the course of his life. The numeration for his photographs is based on the 1979 book, John Wilkes Booth Himself by Richard and Kellie Gutman. Further information about these photographs can be found in their book.
LincolnConspirators.com 
How much is it worth!
Booth images fetch a spectrum of prices online and so there is no set answer to your question. Usually quality original images with backmarks fetch higher prices than period reproductions.