From 1995 to the present, Tonza Borden has formerly owned and operated Castleberry Antiques; sold important American antiques to Howell Mill Antiques, through Gold's Antiques and Auction Gallery, Scott Antique Market, Lakewood Antiques Market, eBay; managed public and private estate sales. In 2008, she became a certified member of the National Association of Professional Appraisers.