Zillow is not to be trusted they have power to manipulate the market prices with their zestimate. Not only that but they're ridiculous leads pricing they charge the agents ($250 for every time you fill out the contact me).
I'm not sure Zestimate actually manipulates the market. Banks don't care about Zestimates when they're handing out loans, they care about appraised value. Zestimates don't recoup the losses on a foreclosure.
Anyone using the Zestimate as a valuation tool is an idiot. It’s helpful for just comparisons, but frequently wrong when it comes to actual transactions.