<p>Interesting exercise. I tried the four calculators mentioned and the difference between the low estimate (Federal Finaid calculator) and the high estimate (Zillow.com) was $120K! Unfortunately, I believe our local assessor relies on Zillow. He certainly hasn’t based his estimate on real world sales prices in our neighborhood. So I guess I’ll be using the average in January and will be scheduling a visit to “Grievance Day” in May.</p>