If anything this just shows you how out of touch with reality Zillow has gotten. Normally when a suspicious sale shows up, Zillow flags the sale price with a “*” and says that the price is not used in the Zestimate. If this mistake is not corrected, Zillow is going to hammer the “Zestimates” of nearby properties. This sales price is under $100 a foot.
With respect to the taxes, unless the buyer knows someone in high places the assessor is not going to rubber stamp this “sales price” as the assessed value.