1. A method for generating a credible market value that is utilized to produce a listing price for a property with a reduced risk of pricing too high and having to make a reduction in the listing price exceeding a predetermined amount before selling the property, the method comprising: importing a first set of property data by a processor from one or more databases having a plurality of properties for sale and that have been sold which includes a subject property and selected comparable properties that have been sold in a specified area within a recent time period; importing a second set of property data by the processor from the one or more databases including the selected comparable properties and additional properties similar to the subject property that have been sold in the specified area within an extended time period greater than the recent time period, wherein the second set of property data includes similar properties that reduced an original listing price to a reduced listing price prior to sale and a first associated sales price, a date the original listing price was reduced, similar properties that did not reduce an original listing price prior to sale and a second associated sales price, and for each property a listing date, a sales date, and a number of days on the market (DOM) for each property that was sold and wherein the second set of property data is larger than the first set of property data; analyzing by the processor an average difference between the original listing price and the first associated sales price at a price change start date when two or more of the similar properties that reduced an original listing price prior to sale sold at a reduced sales price, compared to an average difference between the original listing price and the second associated sales price for each of the similar properties that did not reduce the original listing price to determine consequences of originally pricing a property too high and a list-to-sale-price percentage of a listing price based on the average difference between the original listing price and the second associated sales price for the similar properties that did not reduce an original listing price prior to sale, wherein the consequences include an extension on the DOM and a financial penalty; running a market analysis process on the second set of property data by the processor to produce relative market assessments; running residential value processes including appreciation calculations by the processor based on similar properties having multiple sales to produce a credible market value for the subject property; and running a price sensitivity analysis process to generate a listing price of the subject property that takes into account the credible market value, the relative market assessments, and the consequences of originally pricing the property too high and thereby reduce the risk of having to make a reduction greater than the list-to-sale-price percentage of the listing price before selling the subject property, avoid an extended DOM, avoid being forced to reduce the listing price of the subject property, and avoid a reduction in return to the seller.