Well actually... People who can fight and who have magic or really good skills are going to go out on those missions and stuff right? So it's pretty likely they'll be coming back with a bunch of loot. It'd be pretty handy if they had someone who could buy it off them and turn a profit, maybe even supply them with items they'd need.

[ LIKE AN NPC MERCHANT ]

Who knows? Maybe something they bring back will turn out to be valuable enough to turn into a product.