Alchemy is a great profession for gold-making as the main outputs are consumed on use, this means that there will always be demand for new potions and flasks. The old world recipes are also very profitable. Sadly I don’t have Legion alchemy so I can’t personally help you. The best guide I was able to find on the internet is this video guide by Ninja Kuma.
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Recipes - provide in-game capability to create more kinds of items, and so are always in demand, BUT be careful; if the ingredients are obscure, and the benefits marginal, or the recipe is too common, this is not a good option. Some otherwise very good recipes drop far to often to hold value - Copper Chain Vest comes to mind. This produces an excellent entry-level item, but the recipe is available for low silver at the auction house.
Cool the whlelping spot that has caused so much controversy int he gold farming community. I still think spot is mentionable because it's really the only reliable spot to pull out a crimson whelping. Most of you are probablly thinking this farm is old and beat to death, and you are right. BUT that does not take away the fact that the whelping does drop highest from this farm. If you can get it from the slavemasters your looking at anywhere from 25,000g and above. A cool nifty old spot, that has survived the test of time.
A cool little pet farm that can take minutes or ages depending on the god of luck. This spot contains some of the most dense troll spawns in the game, and each has the highest chance to drop the parrot pet thats soo sought after. On every serve rthis per has amedian value of about 70,000g so picking one up can be a pretty cool feat. Like the sprite darter hatchling spot its, a random farming spot that requires alot of RNG to pull off, but if you get it to drop you can make out in spades. The other drops are miniscule when compared to this spot.
When buying raw materials from the AH, keep an eye out for bargains. Choose only the cheapest items available to keep costs down. Try scanning the whole section of item listings in the AH to check prices; often the prices for stacks of items in the AH are much cheaper than individual pieces (for example, a single Thorium Bar may be priced at 3 , but a stack of 10 may actually be priced at only 2 per Thorium Bar) — you may spend more to acquire your materials, but you also save more and ensure larger profit in the long run. You can find a lot of terrific bargains this way.
Perhaps the most exciting addition this expansion brings to the table is the inclusion of a new islands system that adds an almost rogue-like element to the game. Basically, players will be able to build parties of three and explore these island areas. The catch here is that these areas change slightly every time that you visit them. You'll also be able to access new areas called Waterfronts that support 20 player fights over locations that are reportedly of strategic importance to both the Horde and the Alliance.
If you can answer all of those questions with yes, then you are in a position to make a lot of gold! You can continue doing every step to get to the gold cap as quickly as possible. The security achieved through this can buy you virtually anything you desire in the game, including achievements that would otherwise be impossible on your own, which leads us to the final gold making tip - Selling achievements. If you are the leader or officer in a guild, you can take good acquaintances on your raids with you for achievements like finishing ICC or any other hard raid achievements that your guild finds easy and manageable. I have seen achievements go for 20k+ if you find the right client! This is very situational, however, and is by no means necessary to hit the gold cap, it just helps!
Now that we have a lot to post we reached a point where we have to plan what items we post on an 12-24-48 hour cycle. The auction house fees for Warlords of Draenor items are extremely high. And the values of the items are really screwed up. A lot of the weapons or armor has an item value of 5-10.000 Gold. But they look plain bad and the chances of selling them is pretty low.