PL a crafting means you are power leveling. You are crafting for purely skill ups, and selling your crafts to NPCs (since AH takes some time to stuff to sell).
I'm lvl.40 in Goldsmithing. Taking my time, and picking my crafts wisely. I think I've basically broken even (huge losses from 20-27, and small gains from there on end).
Edit - And then you come across a thread like this, and this makes you wanna cry.
http://ffxi.allakhazam.com/forum.htm...95198107&num=7