Introduction
Imagine a Bitcoin marketplace that is not fully controlled by the admin.
The idea is simple: Make a legal marketplace where everyone can buy and sell.
Decentralization
We can make the market decentralized.
If the protocol has admin, i seriously doubt it's decentralized. Besides, i don't know how would the marketplace could be both legal and decentralized. All i could think is implementing black list or ignore list on client software.
Thanks for your feedback

,
The market probably wont be. Take a look at Silkroad, it had multiple owners. This project wont be the new bitcoin marketplace that is running for more than 50 year on a blockchain.
It is a free market that is fair to anyone and letting the community decide most of the actions.