Well the desktop software has fully decentralized markets. There are not shops. Instead there are "channels" which are Bitmessage channels with security on the same level as TOR. And the nice thing is they are serverless. To join a channel just type in it's name as that will generate the keys for it. There is a default channel where Bitbay offers are posted however nobody is using it as they are waiting for the peg.

We also have online markets at demo.bitbay.market