Members Feedback Community

Hey guys, I'm after a script that has a paid members area (using paypal) inside the members area members can post an item (downloadable)for other members to look at and provide their feedback. If a another member downloads the posted item it is compulasry that they provide feedback (kind of like ebays feedback system). The feedback should be sent through a form - along with the members name, address, URL to a pciture of the member and members webiste url (this info could be kept in a users profile from after sign up) - to the member who posted the item. Thats the rough idea. Let me know if you can do it!