A large and functioning ecommerce site that is very close to open posting for commerce is
www.craigslist.org -- Categorys galore, a healthy and functioning email anonymizer, a healthy and functioning barter list, most major cities worldwide, and MUCH more.
Be truly progressive and get aware that our rights and liberties have been taken slowly, by currency mongers, who then used control of our currency to lever our laws in their favor, for over a century or more. This has forced us into thinking commerce is not good. Let me tell you something kids. As far as civilizing forces go, commerce is just about all we've got, ok? Just because it has been usurped by a bunch of greedy religious apes, and little tin businessmen, for a short period of time, does not mean good commerce is defunct. Not by a long shot.
Use the craigs list to drop kick the corporatism that has taken over the net. Do it now.