Craigslist Specific Advertising tool

I would like to find a programmer that can write software that I use to advertise a specific catagory on craigslist only! The software will be specific with canned messages that I will use to advertise to these people and need to access my email client to send the advertisments.? I know of the craigslist advertising software that is out there however this will be more specific then what they can offer.? Please contact me if you think you can help and we can discuss price. Thanks!