When Secret Service agents seized 2,200 fine-art photographs from a New York warehouse in 2012, they called on New York Fine Art Appraisers (www.nyfaa.com) to determine the worth of the trove of works by masters such as André Kertész, Edward Weston, and Alfred Stieglitz. The firm’s consultants have appraised everything from the art and furnishings at Rockefeller Center to Old Master paintings for a West Coast estate, but their expertise also extends to collectibles, fashion, and even wine. Following the launch…