Similarly, when earning by volume, do not overload the AH with your items. Basic supply and demand: too much supply will make your wares too common and unwanted. Furthermore, with great demand and a cheaper price, you may end up starting a price war with your competitors, with them actively trying to undercut and outdo you. Moderate the amount of items you're selling on the AH to small batches, refilling them only when sold out.
Healing effect looks kinda cool but is very minor, and barely worth using. The guardians again look cool, but are unsurprisingly pretty terrible in combat as well (at least from what I hear, I haven't quite got this one myself yet). And since the blood contracts aren't sellable I don't think, the profitability of this is nil (and even if they were... meh), as you lose cash from the crafting cost. I would probably recommend not crafting this one.
It's hard to step out of the shadow of Legion, which was utterly fantastic in almost every way, to enter an expansion where you get one item per boss in the last expansion because the rules have been changed to force more grinding, where you have to grind reputation in the old expansion that you probably skipped because rep grinds suck JUST to unlock allied races (who aren't fully unique races since they recycle old content such as animations), where questing has SOMEHOW become boring again and where your new abilities are given by items you'll swap out every level, meanwhile being only boring passive effects no one cares about.
Okay, this farm really picked up steam here in late legion. Generally what we're looking for is volatile air, and other volatiles when combined with the potion of treasure finding. This farm is as easy as pulling the entire instance all the way to the first boss – and AOE'ing down ebery mob that follows. In the video you can see me getting volatile airs in stacks of 11 for each pull I make. Wit the trending price of each volatile being worth at least 100g, I was making 1100g per pull. It's by far the most effcient volatile spot, but it has hits limits as you can only reset an instance 10 times before you have to wait a while to do it again. If you only going to be on for an hour or so, this is the spot you want to hit. It's great, fast, and awards a high liquid value of items. Awesome Stuff.
If i start on a new realms, I am farming a lot of transmog from classic and Burning Crusade Dungeons and Raids. In the beginning, i start to post them if they have at least a DBRegionMarketAvg (Average value of an item on all EU realms of the last 14 days) of 500 Gold. All the other items get vendored. The time you hit a stock of 1000 Items, my value treshold raises to around 2.500 Gold. All the items below that value get vendored aswell. Newly farmed items that are above these treshold will be listed. Why? If I start over somewhere, I want to get a certain amount of gold quickly. Cheap items are great for that. Later on, to save time, Quality is better than quantity. As mentioned above, re-posting the items on the auction house takes quite a bit of time. At this point, I can recommend you the TradeSkillMaster AddOn, it makes your auction house work really a hell of a lot easier.
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The old popular example was the http://www.wowhead.com/item=47257. This item differed on my server from a high of 6k to a low of about 3k. When the price was down at 3k, I would buy a few of these and just wait a week. Throughout the week, I would put in trade and the auction house that I wanted 6k for it. I would then immediately go onto an alt and say that I only wanted 5200g. Sometimes, I would get the 5200g and be a very happy man, other times it would take more patience. However, almost always, by the end of the week, the other sellers had reposted for around what I wanted. This gave me a huge advantage. Now, the price ceiling was no longer 3k on the auction house, but 5k. I could now easily sell the few I bought for 4 or 4.5k, which is a huge 50% profit from the 3k I originally invested.
An important aspect to crafting professions in BfA are the warfront contributions. During the contribution phase of a war front you will have to turn in various crafted items to help the war effort. During this time you can make gold with all the professions in the game if you are crafting the items that are currently required for turn-ins. This effect is pretty much the same across all the professions, so I will not be mentioning it specifically.
There are a lot of skills and spells you can train as you progress, each of which costs money. When you can afford to, you should train all the abilities that your class trainer offers. If you're completely broke, it's fine to put off upgrading abilities you rarely use for a level or two so that you can upgrade your most-used abilities. If this happens, you should ask yourself whether you are spending too much money on buying unnecessary equipment upgrades or leveling production trade skills. Be sure to save enough for class abilities and riding training before spending money on other things. This assumes you're earning money at a rate where buying skills makes a difference at all. If you have a hundred gold from two gathering professions by level 20, those skill ranks costing a fraction of a gold won't make any difference to your purse.