An internal auction system may allow a seller to enter a scheduled auction. The scheduled auction may be a simple scheduled auction and a conditional scheduled auction. The internal auction system may receive parameters for the scheduled auction, determine a scheduled auction as a function of the received parameters, create the scheduled auction, and publish the scheduled auction at a specified start time on a seller e-commerce site visible to a buyer. A simple scheduled auction may be associated with a start time and a duration. A conditional scheduled auction may be associated with a condition and an action to be executed when the condition evaluates to a specified value.