In 1980, an 8-year-old boy found three packages containing $5,880 in decaying $20 bills on the shore of the Columbia River — part of the $200,000 ransom D.B. Cooper was carrying when he parachuted from a plane he had hijacked en route from Portland to Seattle. Fifteen of the bills were auctioned off earlier this year by Heritage Auction Galleries.[ From here via here ]