Southern Illinois Realty Experts Back to Search Southern Illinois Realty Experts Categories Real Estate Offices 1508-B Sioux Drive , Marion , IL , 62959 (618) 944-1585 Send Email Contacts Primary Gregory Holthaus Corey McCuan Robert Owsley REALTOR® ROB UNDERWOOD REALTOR® DAVID VAUGHN REALTOR® Share × Print Email Facebook LinkedIn Twitter Pinterest Powered By GrowthZone