There is already an overwhelming number of 3D model marketplaces online. Some of them are free, while others will cost you a bit. One company, based in New York called Kwambio will be one of these paid marketplaces. With that said, they will provide, upon launch, all sorts of advantages to their customers and designers.

One such advantage is that they guarantee that all 3D printers turn out just how you want them. Additionally they will be offering users tools for editing the models within their browser prior to printing. For designers they protect their designs from piracy by only streaming the design files direct to a user's 3D printer. More details on Kwambio can be found here: http://3dprint.com/13552/kwambio-platform-3d-models/