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GazeHawk provides low-cost eye tracking technology for use in usability studies and ad evaluation. Our proprietary technology allows us to use ordinary webcams to run studies. This enables in-home eye tracking, as well as fast, affordable large-scale studies.http://www.gazehawk.com/

Priceonomics is the price guide for everything. Price guides are helpful for buying and selling used things. How much should I spend on this used bicycle on Craigslist? How much should I sell my stereo system for on eBay? Is this used Vespa a good deal, or what?