Economy

You sir should study at an economics school.
But, can we add a stock Market aspect to it? For example, they can trade between themselves for tools, ores, ingots and even have a sort of daily rate for demand and supply, trying to adjust it.

For example we could take the rarity rate of each raw material and then work out a sort of Market value for em. Then tools become a combined price, and so on and so forth.

But I might just be complicating it, even though then maybe people would start to Open up shops and stuff, like someone sells bread, cake , etc. Another makes and sells tools(though now I think that may be useless.