Copy YachtWorld.com

I need a "classifieds" website, very similar to yachtworld.com. I will provide the new design. Here are the requirements: USERS 1. Register/Login 2. Create Yacht Listings 3. Upload Photos of Yacht (with auto-thumbnailer) 4. Edit Yacht Listings 5. Browse Yacht Listings 6. Search and Advanced Search Yacht LIstings 7. Sort Listings by price, brand, location, etc. 8. Email Listing to a Friend 9. Upgrade Listing to Featured (and pay for upgrade) 10. Advertiser Signup ADMIN 1. Approve/Edit yacht listings 2. Upload Yacht photos 3. Upload Advertisements 4. Create/Edit Web Pages for Search Engine Optimization (with SEO friendly URLs, custom Title, H1, and Meta Tags) 5. Feature Listings 6. Add Quicktime VRs to Listings I imagine that there are Classifieds scripts we could buy (or even free open-source) and modify to accomplish most of these requirements. Include in your bid whether you would build on an existing script, or build from scratch. Also include your estimated time to complete.