I have a copy of Tarbell Course in Magic Vol. 1. It has copyright 1927 & 1941 and is signed. It's in good shape except for part of the page below the signature has been cut out. Any idea what this is worth?

https://www.dropbox.com/s/igi4wynmr8eq47......jpg?dl=0

https://www.dropbox.com/s/qpdh7lpg20q9qy......jpg?dl=0