Map of all the Commerce Item Vendors, and the Stock Exchange, marked in RED

Apologies if the in-game markers are a bit to the north of where the actual NPC is, I will make a more precise map later on The guild talents for tax reduction and increased profit let you buy and sell them in a Guild Member's world for a profit, even if they aren't fluctuating this week So if you want more commerce coins, make sure to buy and sell all of these Commerce merchants restock Fridays 1 hour after the daily reset, and Sundays 1 houre after the daily reset