We can replace it with a simple website that lists vendors, the wares they carry, and a public key which can be used to generated 2/2 multisig transactions. In addition a third key can be posted by mods for increased moderation 2/3. All transactions will be done through Electrum/CoinKite/Coinbin. Why on god's green earth should we send another satoshi to one of these marketplaces? We're continually lining the pockets of scammers and the DEA/DOJ. Let's grow up here, it's time.
If no one wants to lead this revolution, I will post a website next week and start the show.
EDIT: For those that mention Openbazaar and other projects, I am not interested. Those creations will be unveiled to the public when the time is right (if ever). I am talking a very simple onion site, vendors profile pages with signed pgp messages and signed bitcoin messages proving authenticity, a listing of products and prices. You will go to this website to see what a vendor has for sale and to initiate a multisig transaction, however you will never send coins to the market, only send coins directly to multisig addresses you create.
The revolution is coming: decentralized marketplaces. No more exit scams, no more seizures. Openbazaar will be released soon.