And of course there are online book sites such as Amazon.com, Half.com and Alibris.
FORBES: Affordable Professional Development in a Tight Economy
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Despite last year's acquisition of Half.com, its expansion into used cars, and the spread of small merchants on to the site, it is still thought of mostly as a market on which to trade collectables.
ECONOMIST: We have lift-off | The
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Hsieh, 42, is the president of online lender lendingtree.com, a position he attained two and a half years ago following the company's acquisition of homeloancenter.com, the mortgage lender he founded in 2002.