In 2006, Canadian blogger Kyle MacDonald traded this red paper clip for a fish-shaped pen. Then, in successive transactions, he bartered his way up to a hand-sculpted doorknob; a Coleman camp stove; a Honda generator; an empty keg with an IOU for beer; a snowmobile; a two-person trip to Yahk, British Columbia; a box truck; a recording contract; a year’s rent in Phoenix, Arizona; an afternoon with Alice Cooper; a motorized KISS snow globe; a role in the film Donna on Demand; and a two-story farmhouse in Kipling, Saskatchewan.

“A lot of people have been asking how I’ve stirred up so much publicity around the project,” he told the BBC, “and my simple answer is: ‘I have no idea.'”