Ghost Hunter

Oh...you are quite an energetic young man. You're brave and handsome, too. Heh heh heh...your name is Link, isn't it. Heh heh he...don't be surprised. I can read people's minds If I looked as good as you, I could run a different kind of business...heh he heh... My shop is the only Ghost Shop in Hyrule. Because of the great Ganondorf, it is a fine time for a business like this...heh heh heh... Oh...I can only hope the world  gets even worse! The ghosts, called Poes, are spirits of concentrated hatred that appear in the fields and graveyard. They hate the world! Young man, if you catch a Poe, I will pay a lot of money for it... Heh heh hee!

The Poe Salesman is a recurring character, every time is purple cloaked and the only seen parts are his hands and feets, and a big red dot in his face. He always holds a stick in his hand. The Salesman is associated with Poes as he always involve Link in activities that require catching this spirits.

The Legend of Zelda: Ocarina of Time
In Ocarina of Time, the Poe Salesman makes his first appearance in the series. He can be found in the house near the entrance of Hyrule Castle Town when Link is an adult. He runs the Ghost Shop, and is sitted in a bed, above him there is a cage with Poe spirits, and in the wall there is a paper with a drawn Triforce. Also in this appearance a Triforce symbol can be seen on his robes.

His profession is to buy Poe Spirits. If Link bring him a Poe in a bottle, the Salesman will reward him with 10 Rupees, but if Link bring him a Big Poe he will give 50 Rupees and 100 points for Link's card. If the Hero of Time hunts all the ten Big Poes, around Hyrule Field with the help of Epona, and give them to the Poe Salesman, Link will earn 1,000 points and will recieve an empty bottle. Also will give Link the title of Ghost Hunter and will tell him that he doesn't need any more Poes.

Earlier Life
Some characters have been theorised as been the Poe Salesman itself. When Young Link enters to the house at the entrance of Hyrule Castle Town, the only thing he will found is a place full of jars and boxes and a Soldier who claims that he is really interested in ghost and explains that is kind of a hobby. When Link return as an adult will found the Ghost Shop, he probably quit from his guard job after Ganondorf's Attack on Hyrule Castle and became the salesman.

There is also the kid that plays in the Kakariko Graveyard at day when Link is a child. This boy plays with a stick, and is interested in "spooky" things. The boy can never be seen a Adult Link, probably he became the Poe Salesman.

When Link is an adult he can talk to Shikashi at Kakariko Village, he will tell about the story of "one-eyed man who could see the truth", this unknow man is associated with the Mask of Truth and Lens of Truth from the Sheikah. The Poe Salesman could probably be this guy, due the fact that he shows one big red eye (as a Sheikah), and tells Link that he can see into people's minds (one of the powers of the Mask of Truth).

The Legend of Zelda: Majora's Mask
The counterpart of Poe Salesman in Termina can be found a few times, in this appearance the Triforce on his clothes can be seen no more, most of the times after making an agreement with the Salesman, he will just vanish.

When Link tries to get to Ikana Canyon he will be sitted in a high ledege impeding Link to advance. If Link presents with the Garo's Mask, he will create a tree for Link to use the Hookshot to go up the canyon, the Salesman will just vanish. Above in the valley the Poe Salesman can be found at the Spirit House, where she has the Poe Sisters captived. If Link accepts and win the challenge of defeating all the poes, he will recieve a Piece of Heart.

If Link have found the Light Arrows, he can make a sidequest at the Secret Shrine. There will find the Poe Salesman, who warns Link about the creatures of the shrine fighted early by the hero at the dungeons (three Dinolfos, a Wizrobe,a Wart and a Garo Master), and lets to know that they have been waiting there for rematch. If Link defeats every enemy the Salesman will reward him with another Piece of Heart, later he will just vanish.

It is unknow if the Poe Salesman can revive the dead (as in the Secret Shrine), also is a mystery if he has a connection with the Garo Ninjas, who are similar in to him in appearance.