Yardsale isn't taking a cut of the proceeds as it seeks to attract users.

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Mr. Mulligan used to sell used items through Craigslist, but he finds Yardsale easier to use.

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Brenden Mulligan, a 32-year-old app developer in San Francisco, has sold electronics, including a MacBook Air laptop, via an app named Yardsale.

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Hoffman helped build Priceline.com, the name-your-own-price travel site, part of tech holding company Walker Digital, and later headed up other Walker business units, including Priceline YardSale, which applied the auction model to selling everything from toys to refrigerators.

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Citigroup is holding quite a yardsale.

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At first, The Avett Brothers' "Yardsale" unfolds as a fairly straightforward study of the mundane items at a neighborhood yard sale: From plastic flowers to a blade that may or may not have been used, the selections are viewed from a bittersweet distance, as if the band merely wants to draw a character sketch of lonely and unloved household goods.

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