I found out a nice way to make some quick and easy gold.
On my server, a stack of the Iceblade Arrows sells for 10g, and they stack up to 1000.
What you do, go to your factions AH, buy either Iceblade Arrow or Shatter Rounds, the new epic arrows/bullets from ICC. Buy as many stacks of them as you want and then go post them back to the AH in stacks of 100 and set the price for a stack a bit lower than the cheapest one in the ah. As in, if a stack of 1000 costs 10g, post your stack of 100 for 9g.
The default UI seems to be showing the difference clearly between a stack of 100 and 1000, but at least on auctioneer it will look fairly similar.
People will look at your stack price and think it is cheap!
You can get the recipe for the arrows/bullets from the ICC quartermaster with only friendly reputation, so it is fairly easily obtainable if you want to craft them yourself.
I've been buying and selling quite succesfully already, and will keep on doing this as long as it works. You shouldnt buy too many though, if you don't want to risk loosing too much gold. But still, if they won't sell, you can just sell them like normal and probably get your own golds worth back..
tl;dr
1. Buy/craft Iceblade Arrows/Shatter Rounds
2. Post them as stacks of 100, instead of 1000, and undercut stack price
3. Profit!
So this MIGHT be a repost of an old selling guide/scam, just bringing your attention to a quick and easy market, since the new arrows/bullets are quite good compared to the previous ones.