The rewards you get from the Cheap Hero Gold quests are usually according to the difficulty of the mission and where located.

Fiery enchant is one of the quest reward to get WoW gold in the Badlands that I keep on proposing for some times. Imagine you can resell it anywhere for a price ranging from 10-30g, that's remarkably much enough.

However, as of the present I've found out that "Pearl Diving" quest reward in Badlands, the blue pearls, is as good as or even better than fiery enchant.

Well, blue pearls are necessary recipe for an engineer to plan for Flash bombs. So, if you have these pearls you can easily make money by reselling it to the engineers or to anyone who'll need it.

But how can we get them in Badlands? It's so easy! Just look for Rigglefuzz who is responsible for the "Pearl Diving" quest. He will summon you to go to Vile Reef to get blue pearls there, and most of the times he will ask you to get 9 of these blue kind pearls.

I know it would take some times to look for 9 blue pearls but I'm sure you're time will not be wasted because you can also grab some consolation items there.