If you want to REALLY see a book that has increased in value, try finding a copy of C.S. Ferris' and John Beard's Springfield Model 1903 Service Rifle: Production and Alteration, 1905-1910, which details the many changes made to the M1903 during its early years. A small, 66-page book which is still (IMHO) the best book on this subject. Used copies go from $100 to $260!!