 Biblio.com announced a joint three-way agreement with Bibliopolis, LLC and Antiquarian Booksellers' Association of America (ABAA) in April 2009, to provide a new e-commerce site for ABAA members and their books.Begun in 2000 as a metasearch or price comparison engine, Biblio changed to be a marketplace in February 2003.Biblio seeks to differentiate itself from its competitors by preventing penny books and limiting print-on-demand books.