Well, I didn't mean for it to sound like some sort of supernatural being, a "god of trading" if you will. I was more along the lines of what Robbie.Price suggested. Some sort of world trade network. I like the idea of inns to establish trade or it could just be some sort of underground black market. I don't care if you have to go to an inn, maybe there are merchant caravans wandering around the wilds, or just a "Trade on black market" button. I just thought it might add a bit more spice to the game to be able to sell resources and maybe buy some interesting items.
By the way, BK, you don't know where a merchant would get wood from? There are suppose to be other people living in the world besides just the major factions. Thats why there are heroes wandering about that are for hire. And I'm sure some of these people that don't belong to particular factions have trees growing on their property that they would like to sell.
Anyway, this was just a rough concept that I thought we could be refined to fit in with the game style. It was due to me having about 1000 materials and not many other resources to work with in a game I was playing.