The Poe salesman, found only after Link has become an adult, is located in the guardhouse of the former Hyrule Castle Town in Ocarina of Time and runs a ghost shop. He sits beneath a cage containing several Poe spirits and pays Link to bring him more. If Link catches a Big Poe and sells it to him, the Poe salesman will give him fifty rupees and one hundred points. Once Link has amassed a thousand points, he will receive a bottle from him. Interestingly enough, if Link goes to the guardhouse as a child, the Hylian soldier on watch there will tell him that he is "really interested in ghosts". It is fairly safe to presume that the Poe salesman of Majora's Mask is a different being entirely from the one in Ocarina of Time, excepting their physical appearance-zelda wiki