For the last two and a half years, Kyle MacDonald has been conducting a massive experiment in the relative value of objects and experiences. On July 12, 2005, he went on Craigslist and offered to trade a red paper clip. Almost a year later, he ended up with a house at 503 Main Street in Kipling, Saskatchewan. He's in Seattle to sign his book and tell his story, which includes a Ski-Doo, a ceramic doorknob, a man who traded a role in a movie for a snow globe, and an afternoon with Alice Cooper. (Form/Space Atelier, 2407 First Ave, 208-9843. 7 pm, free.)

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