After running to Twilight Highlands this evening to check on the limited quantity reagents (Una Kobuna), I see that they are not "rare" or limited quantity items anymore (I must have missed out on that one...).
So I bought up a few stacks, and tossed them on the AH. Within a round (about 15 minutes of posting) I had sold 5 of the Scavenged Dragon Horns for 120g each (quick 500g profit). So I guess I am not the only one that missed this one. Take the portal, visit your friendly vendors, and get back to the AH.....