For more than 25 years, the CENTURY 21® System has been helping people sell their homes. We understand the selling process an ... d have designed the CENTURY 21® Customized Marketing System to assist you in differentiating your home from others in your marketplace. This marketing system will help alleviate any anxiety you may have about selling your home and guide you through the selling process. Our CENTURY 21® Customized Marketing System will show you all the enhanced marketing support and customer convenience services the CENTURY 21® System can offer you. read more