Any site that allows anyone to post rental listings is plagued by the same thing. Be careful with any listings you find here or on Craigslist or other sites. Never send money in hope for keys. If a deals too good to be true, it isn't.
Sorry for your bad experience. You might want to find a local property management company to help you find a rental. There are generally no fees and you may find something before it hits the MLS's or other sites.