Mask Trading Sequence

The mask trading sidequest is a continuous chain of trading masks to people around Hyrule. You start the sidequest by talking to the Happy Mask Salesman and he gives you the Keaton's Mask. The rules are: you sell the mask to the person that wishes to buy it, then the person you sold it to gives you the amount that is needed to buy the mask, then you bring the money back to the Happy Mask Salesman and he will give you a new mask to sell. Once you have sold all the masks available, the Happy Mask Salesman will let you borrow some other masks that are not salable and use them at your desire.