If you don't check the ah multiple times a day I find it very hard to make a good profit since you get so often undercut.

Today I was trying to sell a buckloads of glyphs which I had still lying around on my inscription toon. It only took an hour to get 80% of them undercutted.

I bought a few of those epic recipes and make a decent profit of those by crafting the items and the berserk enchant sells quite good as well.

The competition these days is really fierce so playing the ah (even it can be fun) went from a part-time job to a full-time job