A P2P Open Source Decentralised Free Market

Help me brainstorm please. How far out of leftfield is this idea?

Bitcoin puts value on the net. Imagine a sibling network, to put goods and services on the net in like manner.

A P2P, open source, decentralised market where anyone could theoretically trade anything with anyone anywhere under free market conditions and have it delivered. Requiring only a phone and some btc. So take all Bitcoins features and skill set and apply it to putting goods on the net.

To draw an image in your head. Ignoring the block size wars. Imagine a bitcoin transaction carrying a little more information (Location, value and basic description of a product) was sent to a dedicated market address. This address would be visible to anyone anywhere in the same way btc's utxo's are - effectively acting as a global shop front.

I appreciate that there might be the odd large body of water to navigate and a couple of legislative issues to sidestep.

I'd like to invite discussion and comments please.