See Zenlist in action
You can publish Zenlistings either in a banner ad-sized widget or as a complete, stand-alone classified ads section. All formats allow your users to browse and reply to listings, as well as post and manage their own listings. You can also customize any Zenlist template to match the look-and-feel of your website by adding your own CSS.
Currently available format choices
Medium Rectangle (300x250 pixels) format:
Stand-alone Classifieds Section, Wide Layout: