DALLAS – It was a rarity made for what has been called “the most important manhunt in American history” … and the savviest of collectors knew it. A $100,000 reward broadside issued by the U.S. War Department, April 20, 1865, created after John Wilkes Booth assassinated President Abraham Lincoln, sold for a record $275,000 to lead Heritage Auctions’ Sept. 25-26 Americana & Political Auction, including the Brook Mahoney collection of George Washington Inaugural Buttons, to $2,170,799 in total sales.