Special Collections at the University of Delaware Library does not provide appraisal services. It is best to obtain this information from professionals who are aware of market values, collecting trends, and who can view the condition of the item(s) in person.
as well as the International League of Antiquarian Booksellers provide membership lists to help identify local booksellers and appraisers near you.
For additional resources about book collecting and preservation, please visit Book Collecting Guide and Book and Conservation Resources Guide.