Mark C. Henderson and Robert W. Chenault purchased 6010 N. Crestwood Ave. in Richmond as an investment from Arlington Road Associates LLC for nearly $1.01 million, or about $67.50 per square foot. The 14,932-square-foot flex building is in Henrico County and is on 1.56 acres. The property also boasts seven loading docks and is primarily used for research and development.