Online estimates like Zillow, realtor.com, Redfin, & Homes.com are convenient, but typically lack accuracy and may have a significant margin of error.  They are constructed using a computer-generated algorithm that utilizes historical public sales data and trends called an Automated Value Model, AVM. National AVMs derive values from automated computer modeling of public records and may not reflect the true value of a home due to the nuances of local markets.  An experienced agent, familiar with home sales in the area, takes several steps to arrive at a more accurate fair market value. Real estate agents provide invaluable expertise by leveraging their deep understanding of local market …