Zumur does not attempt to reproduce but rather to augment the role of traditional aggregators and vendors (i.e. Google Shopping, Yahoo Shopping, Pricegrabber, Craigslist, etc.) by serving as the demand aggregator to their supply side aggregation function and in so doing providing access to >95% of the product base on the web as well as persistence capabilities. The latter enables Zumur to capture very evasive "willingness to pay" data.