CINCINNATI — Quantum Real Estate Advisors Inc. has brokered the sale of a 14,490-square-foot retail property in Cincinnati for $5.2 million. The property was originally leased to Walgreens, which closed four years ago. Walgreens sub-let the building to Dollar General, which maintains about seven years on its lease. Daniel Waszak of Quantum represented the seller, a New York City-based private investor. A Texas-based real estate investment fund was the buyer.