Reward: The White Narwhal (Pardon Pusher variant)
Description: In this quest, the Innkeeper talks about how the Piece of Eight is a form of pirate currency, and a pirate whom wants to do buisness with him only deals in Piece of Eights. He asks for you to return seven of them to him, and as a reward, he will give you one of his ships that he obtained, the White Narwhal.
Walkthrough: The Piece of Eights can be found while looting the bodies of the various pirates you encounter. They will be found on bodies at random, and are indeed, a bit on the rare side! So one will expect to kill many pirates in order to obtain all the pieces.
This may be a reference to the nine pieces of eight in Pirates of the Caribbean: At World's End.