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From their site: With 180 million registered users across 33 international markets, and over $54 Billion worth of goods transacted in 2004/2005, eBay has the data you are looking for. Easy integration, On-demand access, Robust eBay analysis, 90 days of history, eBay marketplace research. input keywords and eBay categories and returns avg selling price of item.
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There are no source code libraries or how-to links for DataUnison eBay Research. If you know one why not add it?
I wish they had more details accessible to show this.