I think there is a need in having some sort of marketplace of any kind that will have no owners basically..
Picture a marketplace that is like eBay/Amazon but has no physical owners instead is built by people for people through crowdfunding. Is that achievable?
I guess it could, right?
I think it is not a good idea. We need somebody who will control platform: make updates, register new accounts, block cheaters ect. How will you give back money if you will have bad deliver?