Financial Advisor Magazine:  Get ready for the biggest tag sale in history. More than 1,500 items from the estate of Peggy and David Rockefeller — Impressionist and American paintings, English furniture and silver, 19th century carriages, Persian rugs, Japanese porcelain, Moroccan lamps, a Napoleon’s dinner service, duck decoys, gilded Buddhist deities, African figurines — are coming up for auction, starting May 8 at Christie’s in New York. There is an online sale and six live auctions. Christie’s officially estimated the trove at more than $500 million, while privately whispering that it may be much higher.