Current Events & Trends | May 2010 | Rebecca Rego Barry Rare Coin & Stamp Make News A 1794 silver dollar sells for a record-breaking $7.85 million, and the "world's most valuable stamp" also changes hands for an undisclosed amount. Read the report in yesterday's New York Times. read moreCurrent Events & Trendscoin collectingnew york timesphilatelyrare coinrare stampsilver dollarstamp collecting