Homeowner sues Zillow for allegedly undervaluing her home

Zillow's housing price estimate tool is facing its first legal challenge.
An Illinois homeowner filed a lawsuit against the online real estate database this week, claiming the company's "Zestimates" feature lowballed the value of her house.
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Since Zillow obviously can't take a tour of every house in the country, "Zestimates" are based on tax data and other public records that are fed into the company's proprietary algorithm. T