Sellers can price high, low or close to what they hope to get. To judge whether the list price is a fair one, be sure to consult comparable sales prices in the area. The sales price is the amount of money you as a buyer would pay for a property. The appraisal value is a certified appraiser's estimate of the worth of a property, and is based on comparable sales, the condition of the property and numerous other factors. A number of Web sites and services crunch the numbers from historic public records of home sales to produce the statistics.
Some services offer an actual estimate of value based on acceptable software appraisal standards.
They also depend on historic home sales records to calculate the estimate. Neither of these services produce official appraisals. They also don't factor in market nuances or other issues a certified appraiser or real estate professional might in assessing the value of your home.