Apparently they gathered the data by scraping. http://blog.rentswatch.com/writing-scrapers/ http://blog.rentswatch.com/writing-scrapers/ The scraper is here:

Apparently they gathered the data by scraping. http://blog.rentswatch.com/writing-scrapers/ http://blog.rentswatch.com/writing-scrapers/ The scraper is here: https://github.com/jplusplus/rentswatch-scraper https://github.com/jplusplus/rentswatch-scraper Hm, they don't seem to include a specific implementation for Craigslist, though they mention it as a datasource on their blog. Maybe email them for a copy of that. In Omaha, Nebraska, at least, Craigslist isn't the final word on rent prices. You'll find disproportionate representation of certain classes of apartment/house. The cheapest and the most expensive housing won't be found on CL.