Can you tell me how much my book (print, manuscript, object, etc.) is worth?
The Library of Congress does not authenticate or appraise books, manuscripts, works of art, or objects. These services are generally provided by businesses such as auction houses, professional appraisers, and antiquarian booksellers.
Many professional associations of booksellers and appraisers maintain online membership directories through which you can find a specialist to authenticate or appraise your item.
You might also check with your local library to find general guides to collecting books and other items, as well as price guides and compilations of auction records that may help you estimate the value of your ite (Standard price guides for books include American Book Prices Current and Bookman's Price Index).
Your Old Books, written by Peter Van Wingen and revised by the Rare Books and Manuscripts Section Publications Committee of the Association of College and Research Libraries, answers frequently asked questions about book collecting.
Format specialists in Library of Congress divisions provide additional suggestions for locating appraisers of prints and photographs, newspapers and periodicals, and artwork. In addition, the Smithsonian Institution maintains a more extensive online guide (also, Researching Your Art, from the Renwick Gallery) to determining the value of antiques, artwork, and other collectibles.