Forget Sotheby's. Costco Online is the new in site for fine art. In January it auctioned a crayon-on-paper drawing of a face signed by Picasso and authenticated by his daughter, Maya, for $39,999.99. Art dealer Jim Tutwiler, who sold the drawing to an unidentified buyer, says Costco's markup is one-tenth that of traditional galleries. Costco.com sells everything from caskets to computers to bulk chicken.