I'm kind of missing the more "risky" elements of a good game. I'm aware one can speculate on how much parties are willing to pay for stuff by looking at their needs, but there's a lot that's set in stone. Maybe there's room for things like bribing the couriers to get your goods faster (might work, might not, depending on your reputation, the amount of gold you offer, the items you're ordering etc.), haggling with your supplier for a discount etc.?