Bookfinder searches 150 million books for sale from dozens of used booksellers, including EBay, Alibris and AbeBooks (which now owns Bookfinder). Advertisement.

Abebooks.com bills itself as the world's largest online marketplace for books â especially used books. Its database includes 13,000 independent dealers of new, used, rare and out-of-print books.

Used books sell for 50 cents to $5 at Rohnert Park-Cotati ... Mackenzie noted that she and her volunteer colleagues usually price books using online resources like bookfinder.com, a used book ...