Sure, Christie’s and Sotheby’s offer blockbuster artwork, but do they also sell Barbies? (Hindman has a collection of the classic dolls up for bid from August 3 to 14.) If you want variety, this is the place: It sells everything from Audubon prints to Tiffany diamonds to the contents of Lilly Pulitzer’s estate. As one art dealer puts it: “Leslie has got her tentacles in everything.”