From The Girl with the Gallery: Edith Gregor Halpert and the Making of the Modern Art Market (the book I keep raving about):
In another brazen sales gambit, [Halpert] concocted a plan to sell in bulk to museums, telling Stieglitz of her scheme to offer the Metropolitan Museum of Art a large group of American pictures with the proviso they might exchange the paintings at any time, if another work by the same artist appealed more. She adopted this selling scheme from Joseph Duveen . . . Duveen offered his millionaire customers the option to sell back their purchases. (page 293)
Is it brilliant art marketing to offer your very best customers (not just anyone!) one of these options?
Some artists are always trying to think up extra services they can offer their customers. Is this a good one?
If you haven't listened already, check out the art of persuasion before you dismiss this idea.
(By the way, Duveen: A Life in Art is another book on my shelf that needs opening and reading!)