Most of the numbers come from previous market sales in the area, and the amount of renovations that will be needed in order to get the house to that level to sell. A good portion also comes from having closed on over 500 homes, we really know what houses will sell for, and how long we can expect to hold them after doing it so many times. Chances are we have bought dozens of houses right around your neighborhood and know exactly what it took for that house to be a winner for all parties.