The works-Claude Monet's "Poppies near Vetheuil" (above), Edgar Degas's "Count Lepic and his Daughters," Vincent Van Gogh's "Blossoming Chestnut Branches" and Paul Cezanne's "Boy in a Red Vest"-showcase the talents of four of Impressionism's heaviest hitters. Keep your eyes on Craigslist and eBay!