Ten years ago I had started on yahoo one of our several groups: to help online sellers promote their business and buyers to post what they are looking for.
Due to lack of time, I hadn't done much with it. Now with various tool at our disposal, Facebook, Twitter and others, this is a good time to start the new year right and get more serious with this group. Some of the spam posts are cleared and hopefully all future posts that are not in compliance with the group's purpose, would be deleted.
Therefore, if you have online business, you are welcome to participate. In particular, there is the links section with various folders. You may add the link to your online store there.
You are welcome to promote it anyway you can, to turn it into a functional group.
Best of luck with your online sales!