We Buy Houses In Dardenne Prairie, Missouri. When it's time to sell your Dardenne Prairie, MO home, there can be some confusion when determining the value. If you REALLY want to know what it is worth or how much cash for houses in Dardenne Prairie you will get, you can pay to have an appraisal done. An agent should be able to provide you with detailed CMA reports, letting you know what is going on in your neighborhood. Knowing the differences in these home values can set you set your ideal asking price!