LANSING, ILL. — Quantum Real Estate Advisors Inc. has brokered the sale of a 47,158-square-foot multi-tenant retail center for $2.9 million located at 17030 S. Torrence Ave. in Lansing, about 27 miles south of Chicago. A Dollar General anchors the property. The retail center was 75 percent occupied at the time of sale. A local real estate investor based in Schaumburg, Ill., sold the property. The buyer was a private real estate investor based in Milwaukee. Chad Firsel and Daniel Waszak of Quantum were the sole brokers in the transaction.