Craigs "List Real Estate For Sale" automated posting component for Joomla

We are looking for a way to automatically post a real estate listing from within our Joomla site to Craigslist. Mass posting to multiple categories and multiple cities is not required... only to "Real Estate For Sale" in a user selected City. Our only requirement is that a user can simply post the listing info from our site directly to Craigslist along with a link back to the listing on our site and contact info.