They might have copied the idea of Lockchain but they also developed it further. They take the decentralization aspect one level further. Dispute resolution, review system profile and authentication is done in a decentralized manner. As one can see from the image Lockchain only uses the blockchain for the listings and the payment.

I'm a great fan of the Origin Protocol (originprotocol.com), which provides a library for developers to create decentralized market places. Beetoken is built on top of it and benefits from other decentralized economies, since they have one common reputation system.