Volunteers pull these titles during sorting based on age, signature, edition, condition, or subject scarcity. Prices run from a few dollars to several hundred, and the section is often behind a table or in a separate room with its own attendant.
Silent auction versions ask you to write your name and bid on a sheet beside the book. Bidding usually closes on the final day at a stated hour, and you must be present or reachable to pay and collect.
Value here is uneven, which is what makes it interesting. Volunteers are excellent at spotting old and signed books but often miss modern scarcity — niche technical manuals, out-of-print regional titles, or in-demand series that carry no obvious collectible markers.