So it seems like, that people reached lvl 80, and they tend to forget about this wonderful gold making opportunity, called primal farming !
So why is this so wonderful? - one might ask - because they are part of a lot of recepies, that makes profession leveling easier, and therefore there is a rather large demand for them.
The best selling primal, that I have found is the Air. Why is this the best ? You seldom see any on the AH, because people don't play their 78-80 in Outland anymore, where you get the majority of the Primal Air from. And because of this, farming places are deserted, and the AH is in a big need of these items.
So where do I get them ?
The best method is to go from the elemental plateu to shadowmoon valley, back and forth. This is because if you are a level 80 you clear these places fast, and you would have a lot of downtime if you only used one of them, but instead going between these two places you have mobs to kill all the time (Epic flying mount is advised)
So you port to shattrath, fly to Nagrand (69.24) and after you've cleared all of the mobs out there you fly to Shadowmoon Valley (60.61), then rinse, and repeat. Here's a picture for viewing pleasure:
You have to kill the giant air elementals, pretty self-explainatory.
Just check out the prices for Primal Air, and you might even find, that there are not any, and this is in fact a better method then farming Eternal Air.
You can also farm Primal life, and water, but I have found these are less of a profit, however a bit easier to farm.
My recommended places for these are :
Zangarmarsh (Life)
Skettis (Water)
These are mainly used in tailoring, and while it might not be as good as Primal air, they sell at a really great price compared to the time needed to get them.
You can also do the heroic shattered halls, and kill the Shattered hand Executioner which drops 2-3 primals, if primals go on a really good price on your server (just like mine) this can easily be worth your time.
Thanks for reading this, I hope I helped. This guide was supposed to help you if you are tired of chinise guys farming all of the fine Eternals, and you simply can't get anything because of them. So good luck, have fun.