The mission of OpenBazaar is to give everyone in the world "the ability to directly engage in trade with anyone in the world for free," says Brian Hoffman, the project's 33-year-old project leader.
A peer-to-peer network for selling goods online, OpenBazaar runs on open source software that users download and install on their computers, which is similar to a BitTorrent client. The client connects them to the OpenBazaar network, where they can trade with other users. It's like eBay without eBay. All items are paid for using bitcoin.
http://reason.com/blog/2016/08/08/can-openbazaar-make-free-trade-unstoppab 
