“[W]ho’s the private collector who dealers specializing in early 20th Century California Impressionist paintings say got a fabulous buy” — $963,000 — “on 18 pieces that the Orange County Museum of Art sold in March because the museum no longer shows and collects works from that period? And who should Bolton Colburn, director of the Laguna Art Museum, which does show and collect what’s often also called plein air painting, call to beg or dicker with?”