 | 在一个开始降价的市场，zillow 可能高估房价２０％：最近的例子：
最近看了许多房子，发现大部分卖主以ZILLOW的z-estimate 为基准，定价。有的就是以Z-ESTIMATE为卖价，不多不少一个子儿。有的订偏高１。２万，有的少１。２万。可是，在一个下降的市场，zillow 数据偏离市场不少。
前天（８／１）刚好看到一房子，SUNNYVALE 的接近cupertino的好学区，按说较好学区的房价即使不涨，也该持平，更何况现在是以往的旺季，可是不然也。这个房子。前天zestimate=1.222MILLION,今天（８／３）已降到 １。１６ million。
房子： ５６３ Alberta Av., CA 94087
4bed,3bath, 2186 sqft, lot 17,424 sqft, built 1960.
sold on 7/3/2007 at $1,059,000 ( 为什么原屋主才５天就又降价１６k卖掉？搞不懂）
sold on 6/28/2007 at 1,075,000
现在，来看在当时 ７／３／２００７ 的ZESTIMATE: 从今天８月３日，ZILLOW'S DATA:
Charts & Data
ZESTIMATE™: $1,160,311
30-day change: -$118,057
Which means, the house price is going down by 118,057 from the previous Zestimate,
so, I can conclude that on 7/3/2007, Zestimate= 1,160,311+118,057= 1,278,368.
However, on the same date, the house was sold at 1,059,000, which means, zillow overstated the house price by $219,368. i.e., 20.7% overstated the price.
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