Every npc is a trader or a potential victim of nimble fingers. Almost any party make up will work on medium difficulty. Tactician or honoured becomes a "little" more tricky. Some of thebeauty of this game is revealed in the options..different ways to achieve interesting results )) Sometimes the game will rock you back on your heels with such unexpected situations it's really a treat to experience.
Most NPCs have a reddish barter square top left of there dialogue box. Use a barterer or persuasive character to trade )
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