The only project that comes somewhat close to that is OpenBazaar, and that is buggy and unwieldy, despite four years of development and millions in funding. The

The only project that comes somewhat close to that is OpenBazaar, and that is buggy and unwieldy, despite four years of development and millions in funding. The implementation requires a complex mess of software installs (even for potential buyers!), trusted moderators (how exactly do you trust a random unknown username on a pseudo-anonymous market anyway?) and an appalling user experience. The installation page tells me that I shouldn't risk large amounts of money, so even the developers aren't confident in their system. On top of all that, the 'decentralized' part is a pipedream anyway, there's no other implementation of the marketplace and everyone ends up having to trust thousands of lines of code. Under the hood, there's likely to be some centralized control, since the OpenBazaar investors most likely want to earn some money, which is through commission on sales. If it was actually decentralized, then everyone would be able to run their own version and avoid paying the commission in the first place.