are sold prices on zillow accurate?

[Drew Brock]

I was looking at comps around my primary residence and noticed the sale price on zillow was actually my total amount financed (sale price plus closing costs). I saw one house a few doors down that sold for quite a bit less, my question is does zillow look at amount financed or actual sales prices?  I was thinking if someone put $20k as a down payment would the sale price on zillow reflect only the financed amount (sale price minus down payment). If you can't tell by now, I'm new at this. ;)

Thanks