Christen Carter's pinback button collection includes buttons from George Washington's inauguration, rare buttons of Oswald the Lucky Rabbit, and Prohibition era buttons, but she may consider a trade for a rare Muhammad Ali button.

Sean Kelly's passion for video gaming has turned into a business, a museum and a collection that includes a prototype of the Sega Neptune System, but he may be tempted to make a trade for a copy of the rare video game Magic Card.