Rotemi and another real estate broker contend they entered into a contract under which they would receive a commission if they procured the sale of a tract of land to the Miami-Dade school district. The district bought the land, but the owner refused to pay the commission. The trial court ordered that the commission be paid, but the Third District Court reversed on grounds that a brokerage contract is void where payment of the commission is contingent on sale to a governmental body.