First, your character has to be at least level 10. Second, you have to pay an initiation fee of 25 gold to become a trader. After you become a trader, you can start trading by selecting any of the channels from the Channel List for items categorized at left side. Here, we will tell you a channel. After joining the channel, you can link an item in the trade chat by holding SHIFT and clicking on an item in your inventory. Last, each transaction needs a commission of 15 gold from both parties.