I researched several classified programs for a while before purchasing. I finally bought Titan classifieds. The program is very user friendly and offers a good deal of flexibility. You can change the colors of the menu, buttons, font, font size, add or remove maps, categories/subcategories…
They provide you with some cool features if you want to monetize your site. I’ve added Adense on all ad pages and I must say the CTR is high. You can also place banners on the pages, charge users to post ads, charge users to place their ads in special sections of the site or in the homepage gallery.
The support is good judging from past experiences with online software companies. They listen to you and are prompt to reply.
I give them an A+ for their product (and customer care). The combined effort and service they provide is worth the price they ask for.