The Exam Prep feature, which you can purchase separately or as part of a package, includes the money-back guarantee. Real Estate Express guarantees that students who score at least 80 percent on the final course exam within 180 days of purchase will pass their state licensing exam on the first attempt or receive a full refund. Students must take the state exam within 30 days of scoring 80 percent or better on the course exam. This guarantee isn’t available in Florida, New Jersey, or Tennessee due to state regulations.