Why don't we make a collaborative, distributed market? It would be open source, trustless, free and safe. We would use multisig instead of escrow so there'd be no fees above the normal tx fees. Maybe we could integrate blockchain tech so people would earn BTC (or a custom coin which can be converted to BTC) for hosting the market's listings.
https://github.com/six-pack/Axis-Mundi It looked promising.