I have totally modified a php script to include many features. Users dont have to register to post ads. Unlimited categories and sub categories. Unlimited regions, cities and areas. Featured and extended ads with paypal integration. Easy to use admin panel. (add change categories, regions, prices etc) Featured ads rotation maximizing exposure. Search engine friendly urls. Every page is a new searchable page that gets indexed. Footer can contain any php or html code to appear on every page. Email reminders for expiring ads using cron job. Built in search engine for ads. Adsense ads appear in 3 places plus Google search bar. Free whos online stats counter and hit stats counter set up for you. Free flash chat room hosted on my server. You choose your prefered colours for the site. Included is 1 years free unlimited hosting then just $10 a year after. Also free search engine submission to all of the popular search engines. I create robot friendly meta tags into your site. See my signature links for examples of this setup. Interested? I will do this the same day for $80.
I can show you an exact site in the signature links or you can just visit www.postfreeads.net Sorry I havent set up a demo site yet.