Looks like Arkinventory mod that Sam is using.
As for the gold making, on my server heroics do not make anything like the money the OP is talking about. The enchanting mats market is in the toilet since the Enchant option for loot roll.
The only way I normally can offload certain enchanting mats is to use Vellums to make an enchant from them.

Ualaa, I am at lvl 76 with my Druid, shammies X 3 and Priest and I have the BoA chest and shoulders which made a huge difference. I completely skipped Zul'Drak, only thing I did there was do the Amphitheater of Anguish which actually gave me roughly 25% of a level. Now that I am 76 it feels like the home straight

One last comment of Ret Pallies, previously they were teh worst class in the game, so no guarantee that they will not get nerfed again. We can only wait and see