he last pieces of a legendary collection, the nine Imperial Fabergé Easter eggs from Czarist Russia acquired over a lifetime by Malcolm Forbes, the publishing magnate, are to be sold at Sotheby's in New York in April, the auction house announced yesterday.The collection, second in size only to the 10 in the Kremlin, will be offered along with 180 other Fabergé objects from the Forbes holdings. Together they are expected to sell for at least $90 million, at a time when the market for them seems receptive.Many Americans are passionate collectors of Fabergé, but there is also a growing number...