1- NPC trading. Create a new trading window with multiple themed items.
2-Player bartering/shops. Either player or merchant thrall sets up a shop. Using trading window, allowing players to put items up for trade, either agreeing on a trade, or trading for a preset item of x amount.
3-Caravans. Carriages or Backpack NPCs with themed items traveling through wild to resupply camps/towns. Possibly with Fighter guards escorting them.
-Hunter. Skins/Hides and meat.
-Lumberer. Bark, Sticks, and Wood.
-Miner. Stone, coal, and brimstone.
-Alchemist. Potions and dyes.
-Blacksmith. Weapons and tools.
-Armorer. Armor and clothing.
-Artisan. Rugs and Pottery.