Might be worth looking at Colbalt ore/bars and Fel Iron too. Outland mats often go for a bit as does the lower level Northred stuff. Some good profiles about for both of those.
I am doing 12-15k per day with three accounts. One farms northrend, two BC accounts with two separate full outlands profiles. All of my profiles are custom so I dont have to worry about fellow botters being on my ass all the time.
If i dedicate time to it i can make 50k a week on 3 toons on the same server. Keep in mind that dedicating time to me means like 2 hours of me being around for shit. CASUAL like every now and then bot while i code for work and shit i have made 40k in about 2 weeks. 3x toons also keep in mind i rotate them never more than 2 at once.