The Darkmoon Faire is only around once a month, and the one on now is ending this Sunday, October 14th. Unless the Faire is going on, you can't trade, for example, a Crane Deck in for a Relic of Chi Ji.
Ink Vendors finally updated. Very sorry for the delay.- Greg Street (@Ghostcrawler) October 12, 2012
This expansion, unlike in others, Darkmoon Cards require an item that can only be made once a day by scribes, the Scroll of Wisdom. Scribes who have been hanging onto their Scrolls should probably look into making them into cards now that the inks can be gotten cheaply, since by the time the next Faire rolls around, there will be 3 more weeks worth of daily cooldowns waiting to be turned into cards. These trinkets range from pretty good to among the best in slot for most classes, so almost everyone can use one, and many people really want one.
Additionally, since the Starlight Inks have been so expensive lately, the epic quality shoulder enchants have been quite expensive. Now that you can trade the much less expensive Ink of Dreams in for them, you should see the prices lower on the Greater Ox Horn Inscription, the Greater Crane Wing Inscription, the Greater Tiger Claw Inscription, and the Greater Tiger Fang Inscription.
Maximize your profits with advice from Gold Capped. Want to know the very best ways to earn 10,000 gold? Top gold making strategies for auctioneers? How about how to reach 1 million gold -- or how one player got there and then gave it all away? Fox and Basil are taking your questions at firstname.lastname@example.org and email@example.com.