I had this discussion a few years ago and one thing that I found interesting as a thought is that barter is not something people like to do. It's generally only used if a token cannot be used because for instance the token is not stable in value. So in times of crisis people would fall back to barter as an alternative but when a stable token of exchange exists, barter does not play a role.

The first thing that develops in a new community is debt and credit but with regards to if money or barter came first there does not seem to be a lot of agreement. I personally feel that barter is quite an unnatural concept because one party will most likely always lose. I cannot imagine that it would come naturally because it's a step back from debt and credit. The only thing it would give you is the ability to trade with someone you don't trust. And that is probably when you tribe meets another tribe which I feel is something that would happen after establishing a local currency.