Real Estate Investing in St. Louis STLREIA is organized to provide education in the area of real estate investments, to enhance the opportunity for seminar graduates and other members to achieve their individual and financial goals, to promote a spirit of understanding and cooperation between beginning and more experienced investors and to encourage the exchange of ideas between investors.St. Louis Real Estate Investors Association, Inc.™ STLREIA™ is a non-profit organization dedicated to serving our members. We are the longest active real estate investors association in the St. Louis area.