ALEXANDRIA, VA. — KLNB LLC has brokered the $8.3 million sale of 5904 Richmond Highway, a 78,000-square-foot office building in the Washington, D.C., suburb of Alexandria. Joshua Simon of KLNB represented the buyer, a joint venture between Rock Creek Property Group and Avanti Holdings Group LLC. Simon will also handle the building’s leasing assignment. The newly renovated property is located within walking distance to Huntington Metro Station and Mount Vernon Trail. Suites within the building range in size from 1,800 to 15,780 square feet. At the time of sale, 5904 Richmond Highway was 65 percent leased, with five office suites available to lease.