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iOffer is a San Francisco-based online trading community that was launched on May 1 2002 by Steven Nerayoff.As of February 2008 it claimed to have nearly one million total users including approximately 75000 sellers although this information cannot be independently verified nor is it known how many of these users are active.iOffer deviates from the online auction business model and instead adopts the negotiated commerce model characteristic of garage sales and flea marketsoperating on the basis of negotiation between buyers and sellers rather than bidding.