Classifieds site - repost 2

I require classifieds site majorly focusing on Cars and vehicles category. 1. Addition of new categories, sub-categories, pages as easy to use template. 2. Bulk uploading of new ads under relevant categories. Let me know similar sites you have developed and technologies used. Also explain how you have done on above 2 criteria, which helps to decide easily. Also, i may look crawling from other sites, so if you have any experience you may mention with your work sites.