Classified Ultra is a php script that allows you to create your own classifieds ads directory.

This php script uses a database to show and store the Classified Ultra Directory. This script can be used as an addition to a website or as a stand alone website.
Registered users can list their advertisements and show up to 3 pictures per advertisement. Visitors can browse the directory and contact the registered users.
View members, view or delete current listings, approve or decline new listings, edit categories/sub-categories, and view or reply to messages are all simplified for the administration (you).