Board Thread:Suggestions forum/@comment-26553378-20170417215906

Overview
You want to sell/buy stuff, but don't want to actively seek out other players to buy your stuff, or risk them not going through with the deal and taking your stuff. So you use this wonderful new feature. it works by opening a pouch and selecting "set to merchant pouch" you can then make buy/sell slots from the pouch (no more than 9 of each, this goes across all pouches) with all slots except 3 in the pouch (have gui with "Make buy" and "Make sell" buttons, when you click you can select your item and a cost) players can now trade with you whenever they are near and you don't even have to advertise! they can just right click you, and trade, the pouch will take care of the rest, moving items and coins between the pouch and the other players inventory, as well as combining coins of the same value when 10 or more are available in the inventory.

The nice big suggestion
Yup, another suggestion on how players can play as a merchant, hope you're ready!

Becoming a merchant
When you open your pouch you now have a new button: "Set as merchant pouch", when clicked this button will reconfigure your pouches GUI (and make a small coin icon on the item), this new GUI will contain "input" slots and "output" slots based on the amount of trades set up. On the left side it would also contain buttons labelled "Create Buy" and "Create Sell" when clicked they would open a new GUI with a slot to accept items and a slot with a textfield for value. as well as a "create trade" button, which when clicked will fill an input slot with the supplied items, and whitelist it to that item, sell trades would not take up an input slot, but any unwhitelisted input slots would accept silver coins, the silver coin output would also be usable for sell trades, however you can not put silver coins into these slots, only take out. you can only make as many trades as there are slots in the pouch minus 3, or 9 of each type, whichever is less.

Identifying a mercantile player
Players who have become merchants will have a coin above their head signifying that they are a merchant, the merchant title would also be locked unless you are a merchant. a third possible effect would be a "Merchant shield" which would just be a normal held silver coin in the offhand.

Interactions
When you right click a mercantile player the typical GUI would appear for trading (goes directly to the trade screen) and you could then trade with the player, while in the GUI the player can not attack you, nor can you enter it within 10 seconds of attacking the player or them attacking you. When you trade it will take silver coins from either the pouch or your inventory and move it to the other, and do the same with the specified item, alerting the merchant of the transaction through chat (1 second after transaction, tracks the amount of things purchased and a second after the last purchase will give a single message including amount to decrease spam in their chat. The pouch will automatically change coin sizes to be most effective for storage.

Feedback
If you have any problems understanding this please ask, any ideas to improve please suggest, or if you see any problems point them out, thanks! 