There seems to be a few people and tribes that wish to have trading post. So I was thinking about way to maybe add a little immersion to it. I think the plan is now is that we will trade from totem poles and from each other. And thats OK, But for people and tribes that wish to be a trading area for the game. I think something like a storekeeper mode would work good. Let me lay out what I'm thinking here.

Click on yourself and have an option to go to storekepper.
When in storekeeper mode, You have a new option on items in your bag's you have on you.
Set price, Once clcked you can set the price to what ever you wish. Be it 10 any specific type of fish, or flat bone.
Once an item price is set, Anyone that walks up to you and clicks on you will have a new option that pops up, Shop.
When they click shop, They have a pop window that only shows what you have for sell. If they wish to buy from you, All they have to do is click on the item and click buy. You as the storekeeper have to agree to the trade. This would be to keep people from going into storekeeper mode and going to bed and leaving there toon on all night.

There would be nothing that would keep people from seeing what you have and asking if you would take something other than what you set as the price. And doing the trade the way we do now. This in my mind would allow people and tribes to set up a bazaar/flea markets on there tribal lands.