A facility procures information about a property from a user knowledgeable about the property which information is used to refine an automatic valuation of the property (AVM). The facility displays information about the property and obtains input from the user to adjust at least one aspect of information about the property used in the valuation. The facility then displays a refined valuation of the property. The valuation can be further refined/updated using additional information from the user. The user may be the owner, a prospective buyer, an agent, a representative or other third party. The facility may use a web site/Internet.