If Burning Crusade enchanting mats are a high price on your server this is definitely a video you need to check out! Make a couple thousand gold in a hour easy to just run through some old instances.

Most BC instances work because there are 3 grouped right beside eachother, I found that I can run these 4 instances in the same time it would take to run the zangarmarsh ones or the TK instances also you get lots of rep items in the auchidoun instances. Good luck!