Ballwin, Mo. — Mid-America Real Estate Corp. and Pace Properties have arranged the $20.9 million sale of Ballwin Plaza in Ballwin, about 20 miles west of St. Louis. The 204,859-square-foot shopping center is situated on Manchester Road. Schnucks Supermarket anchors the property, which is 93 percent leased. Other tenants include Hobby Lobby, Marshalls and Buffalo Wild Wings. Joe Girardi of Mid-America and Scott Seyfried of Pace Properties represented the seller, Cincinnati-based Viking Partners. Cincinnati-based Select Strategies Realty purchased the asset.