Yeah, old content is amazing injection of gold per week especially if you have a few friends to do DS25 HC with as well (Or use group finder/oqueue) currently my guild just schedule raids every week just to breeze through old content just to help people accumulate some extra gold ready for WoD. You are probably looking at 2k+ per week, not a lot but very casual friendly.
With high enough ilevel and some brains you can breeze through brawlers and make a good penny from doing the Card Collector achievement. You get 500-900g per win and they're all pretty easy. I think it also unlocks a daily as well that awards loads of gold per day? I'm not sure I pretty much left that place forever after achieving rank 10 and that achievement.
Besides MoP dailies and maybe rare farming on Timeless Isle that's it. There is the super grindy way which is to farm mobs with potions of luck and then just selling everything that drops but yeah..not a lot of gold there unless you farm for hours and hours, plus I am not sure about the market on MoP ingredients now WoD is a couple weeks away, I expect people have stopped buying that stuff now and saving up for WoD.
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