In most cases, not very. Automated valuation models like Zillow’s Zestimate are built on statistical comparables, and in a market like Morris, where only 7 to 19 homes are actively listed at any given time and monthly sales volume is in the single digits, there simply isn’t enough data for the algorithm to work accurately. The margin of error can easily reach $50,000 to $200,000, particularly for properties with distinctive features like Bantam Lake frontage, significant acreage, or pre-World War II architecture. These are the exact characteristics that define a lot of Morris real estate, and they’re the hardest for any automated tool to price correctly. A real Comparative Market Analysis, prepared by an agent who knows this specific market, will give you a far more reliable number.