Note: This is a work in progress and is probably going to turn out rather flawed. It will be updated and any problems that arise will be dealt with as the game goes on.
Alright, so what I'm thinking is that the goods merchants can trade will be based on the regions they operate in. Italians will get olive oil, Dutch guys will get textiles and so on. These goods will each be assigned a different roll of the die Some will be risky and others might not have any factors of chance at all. So one might be 2D6, but another would just flat out give you 6. Those won't be the actual numbers of course. That would be pretty stupid. Anyways, I'll post the various regions in this thread and I'll keep things tidy enough. This probably very unclear, so feel free to ask me any questions you might have.