Hi there! I want to build a site similar to shapeways dot com. The homepage layout i think it'll be the same. Most important is the upload model method, users must be registered, then they can access and upload a item by the tag. In back-end an admin approve the model, adjusts the price for the sell because the selling price is determined by the products shipping costs.
Users must have a dashboard where they can see the gallery of their products, adjust fees, change title, description, tags.