The most common reason for you to get a book, or your book collection appraised is to get an official determination of the fair market replacement value of your books. You might need an appraisal to insure a rare book or book collection, or to help with inheritance issues or for determining the value for a charitable donation.
My book appraisal fee is $100.00/hour, which includes on site, my travel time, and office time. The fee does not include other travel related expenses such as airfare or lodging, if applicable.