Well since new players are always running heroics/kara, the end up having lots of badges. So what I do is go into org/IF and say in chat "WTB 15 Badges - 200g". You'll get a lot of questions and comments saying "THEYRE BOP NOOB" but just say you're paying someone to use theirs. Once you get whispers with people interested, ask them to buy you a gem (usually Crimson Spinel or Lionseye, as they're the more expensive ones) and CoD it to you for 200g. Most of the time, they'll say alright and go buy and send it to you. You then resell it on the AH for 350g+.
I've made over 2k gold from this and it's almost no work.
Have fun.