Merchants in Baldur's Gate 3 are people who are willing and able to barter a deal with the player's party. For a sum of cash and some valuables, a vendor is willing to fork over that +3 Flaming Sword their family has been hoarding for the past hundred years.
Baldur’s Gate 3: What Are Wares?
Wares is an important item as part of your inventory in Baldur’s Gate 3, and here's all you need to know about it.