Merchants at which you can buy new weapons, weapon parts, briefcase capacity upgrade, ingredients, recipes, etc. Their stock expands as you progress through the game. You can also sell found treasures at them.
Another function that merchants provide is upgrading the weapons you own. They will do this for the right amount of Pesetas.
When you complete any of the Requests, you must return to any merchant in order to receive the reward for it in the form of an appropriate amount of Spinels. You can then exchange your Spinels for an item, such as a map showing where all the treasures are hidden or an exclusive weapon upgrade.
