This video of Mauradon gold farm which can net you up to 50g per HOUR if you're a Warlock, Hunter, or Shadow Priest with Mining+Herbalism. 35g per hour BASE without and professions at all! Enjoy.
You can also sell runs where you bring in another player and sell them some of the items that drop, namely Blackstone Ring off Princess Theradras. You can probably charge around 30g per item!
I don't take credit for guide/video just reposting to pass the guide along.