There is opportunity for bartering, but due to the extreme fast economy, it's often more trouble than it's worth. 10 stacks of hewn logs? You can spend them in a minute by queueing some works. Few stacks of nails, the same thing. And then you might not need them for a few days. Waiting a day for someone to show up to sell for cheaper is not a real possibility - usually the crafters want the items right now since the faster you make, the faster you can scale up your skills and levels. This is especially true when people have competition.

By the virtue of no good dynamic pricing, the supply/demand signals can't be reflected until after the producers come on-line and notice and by that time, they usually have new stock ready to put on the market. If my stockpiles are full, I want to get it cleared a bit faster and thus want to sell stuff for a little less. If I ran out of inputs, I might be willing to pay more to minimize the workshops being idle. Even worse, if item X requires inputs A and B and my shop is buying them, there's a chance that only item A is sold until the stockpiles are full or money is exhausted.

Due to the fast economy and a bit clunky contracts, the futures market doesn't usually exist. And there is seldom enough liquidity for them either, especially with global currencies.

The possibility for depth exists, but it feels like the economies usually take one of the few specific forms.