Flasks sell extremely well consistently at 100g each, give or take. I usually make 40 a day on my elixir master (10 of each) and throw them up at around 7pm server and they almost always sell out. Essentially, a guaranteed 4k in my pocket every single day.
Potions I'm not so much sold on, fool's cap has become harder to come by, the few I gather I use for the strength flasks, as for the other kinds of pots, it takes extra time to craft 100 of each to sell every night, I personally stopped doing this, even though they were fetching 80-100g per stack.
I have been turning all of my ghost iron into trillium bars, but at this point I have an entire guild tab full of trillium bars, so the next few days I think I will prospect on my JC and make some primal diamonds on my trans master.
I personally used to just cod everything away to other people who would do the shuffle gimmick, but after doing it on my own the past weeks I find it much more rewarding. I actually enjoy this aspect of the game more now than I do any other, and I find myself having a hard time making time to do dailies/LFR on my raiding characters.
Making gold has become my new addiction and time sink this expansion, and I have to be honest, it's much more fun than raiding 4-5 nights a week in a progression guild eating shit from some douchebag raid leader with anger issues.
Now I just buy my gear and have more fun doing it!