DAVENPORT, IOWA — Quantum Real Estate Advisors Inc. has brokered the sale of a gas station occupied by Hy-Vee in Davenport for $855,000. The single-tenant property is located at 3850 Elmore Ave. A Davenport, Iowa-based private investor was the buyer. A southern California-based acquisition and development company was the seller. Chad Firsel of Quantum represented both parties in the sale. Hy-Vee has approximately 1,200 fuel stations across the Midwest.