Random High Prices on Zillow (and others)

[Paul Smythe]

When I'm running comps on properties I will come across random properties that have sold for prices in the millions, and I was wanting to see where the heck those numbers are coming from. For example, I'm seeing an area with prices around 75-125k and there's a random $2.1 million property that looks just like all of the others.

What is causing this? Is it just that there wasn't a price recorded so it defaults to some crazy number? I see this in almost all of the areas I'm looking at.