So, you like PvP and want to make some AD? I have a suggestion for you.
There is one specific item that can only be obtained through PvP, which puts it out of reach of people like myself that are 100% PvE-focused.
If that item was available on the AH, I would not hesitate to pay, say, a million AD in an instant.
So, just what is this item? Well, when the dye colors were introduced, there was one colour that was PvP-exclusive - Otyugh Brown. I have every other colour - just not this one, and, well, for someone who likes to collect things, this "hole" in my collection is extremely irritating.
This colour only comes from the "Roar of the Pack" dye pack, which in turn can only be bought for the banners you get for Stronghold PvP.
The issue is really that nobody does Stronghold PvP these days, but if a group was to do that and farm this particular item, the profit could be...quite significant.
Hoping for improvements...