Backpage.com was not a big lead generator although it was a decent referrer of traffic. Many third party software platforms such as AutoFunds and Dealer Car Search would add used vehicles to regional automotive categories of this site, which was the leading classifieds site behind Craigslist. However, last week, the online service was seized by federal agents, along with its founders and partners.. I have removed the site from our our classifieds section in the Most Popular Car Websites List. Please let me know if there is another site that you know of, which is not listed here, which is strictly classifieds.