Arader Galleries is an established dealership specialising in antique works on paper, paintings and rare books. Founded in 1974 by W. Graham Arader III, in its early days Arader Galleries focused on rare maps, and has been credited with helping to elevate the status of antique maps as desirable collector's items. Arader has subsequently expanded its focus to include rare books, prints, and watercolors, especially works of natural history, and is now the largest dealer of the rare and highly sought-after folio prints from John James Audubon's famous 'Birds of America'.
In 1981, Arader established the Arader Grading System as a measure of the value (financial and historical) of rare maps, prints, and books, as defined by conceptual importance, aesthetic quality, condition, and rarity. Arader Galleries have supplied items to a number of prominent private collectors, and now has gallery premises in Philadelphia, San Francisco, Houston, King of Prussia, Pennsylvania, and New York.