Would like to have an addon that would allow a paying subscription member to pay to be a merchant. They could open a marketplace block, and sell their wares to other members. Payments could be made straight from the user's store and to the payment gateway. Would want to include shipping API from the user's zip code. Might be cool to have it like the User Album addon, where people can make comments and share the complete store to Facebook or other social media. Backend would include payment gateway API, zip code, shipping API and inventory amount. Would want to keep it simple on the front and back end. This is a paid gig, and would like to get some insight from the community on this.