Warcraft Crusader Orb

What are the most valuable tradable items in WoW World of Warcraft?

My friend has found the dupe method that works with the dhtoolkit. He wants my help to find some of the most valuable items to sell on the auction house. I told him Crusader Orbs, Nobles Decks, Bind on Equip Raid Epics, and Chopper mounts. What are some other high value items that can be sold on the AH? We want to get a big list of items to dupe so it doesn't look like we're selling too many at a time.
I appreciate the help some are giving. For everyone who's so upset: We are only going to dupe enough to get everything we want on our characters and alts. We aren't going to ruin the game's economy.
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No more hints

Well, the most expencive things like you said are

Nobles Decks, Chopper Mounts, and most importantly Ulda BoE Epics (or the latest Raid). Every time a new Raid comes out you have to be the first to run it. Roll for the BoE's and hope you win because those bad boys sell for 5,000 Gold for BRACERS!

However, the way to make money is not to go and get these rare epics that sell for an outragous amount of money, the best way is to sell the easier things to get.

Cloths, Ores, and Herbs (no, skinning doesn't make money people, it really doesn't)

Cloths can be farmed off Huminoids. The latest Cloth is great for Tailors and First Aiders... but Silk and RuneCloth are also important for those Levelers and those farming Rep.

10 man Anub'arak Trial of the Crusader ToC Boss 5 - 2009/09/04