One area that virtually nobody foresaw is electronic flea markets (e-flea?). On-line auctions of second-hand goods have become a massive industry.
一个领域，几乎没有人预计到的是电子跳蚤市场。在线拍卖二手货物已变成一个巨大的产业。
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In a consumer-to-consumer category of e-commerce you will find online auctions, where consumers and businesses can buy and sell with each other in an auction process at an auction website.