We at Greenland IT (www.greenlandit.com) have built this Classified Ads solution using Zend Framework. We love to work on LAMP based architecture and Zend Framework. It is really rich with a lot of features and we hope it will be useful to you.
- Search result based on price range, location, category etc.
- Allows authorized users to blacklist advertisers
- Ability to print detail advertiser information
- Allows caching based on page view
- Notification when a classified ad is added or expired
- Questions and answers against each classified by users and advertisers
Pitty this is dead. A great working classifieds ads software too can be found here at www.reddit.com/r/craigslist/comments/4xzcl0/free_online_classifieds_and_search_view_listings/
Simple to use.