In WoW, the higher your crafting skill is, the more wow gold you can earn with the new sets of skills. It is possible to craft and sell gear for huge profits, especially when players are still leveling and willingly give away their world of warcraft gold profits for that gear. The highest demand items are going to be consumables, bags, and crafted gear. The crafting professions include the following ones:
Alchemy - Alchemists can craft anything in the form of potions, elixirs and flasks but since you can only cast one of these things per fight now and nothing major has been added in the form of new content here, you are going to be hardpressed to increase your profits by much though they will no doubt stay the same.
Blacksmithing - if you can get your skills up to 425 and the new cap, you are going to be able to make a ton of gold wow providing crafted gear while people are leveling, especially with more people playing with need for plate armor now.
Enchanting - Enchantments are saleable on the auction house for the first time since 3.0.2 and that means they are worth more than ever. Finally, enchanters are less of a service profession since you have to finish crafting these now before they can be sold – look for a few new good ways to make money here.
Engineering - Engineering never has been and probably never will be all that valuable of a profession. But, look for new guns and scopes and possibly the long rumored addition of crafting additions to things like siege vehicles.
Inscription - This is the most valuable and profitable profession right now, but with herb prices spiked out it's also pretty expensive and because glyph spots are limited per character it will probably peter out with time.
Leatherworking - This profession will be offering new armor, kits and bags and that always means more warcraft gold.
Tailoring - With 32 slots dedicated bags, 22 slot regular bags, and the addition of crafted flying carpets, Tailors will be raking in all sorts of new dough for a while to come.
Herbalism - This profession by far gains the most from the additions made in WOTLK due to the boost in need for herbs for inscription. Expect a huge spike in value for these items with a long term high maintained after the game's economy settles down a bit
Mining – This profession will not actually change much in terms of gold making potential but with the launch of any new expansion, the value of any gathered materials go up. Expect new ore to spike as professions level up to 450 and expect a good 2-3 month time period before they settle down.
Skinning - This is the lowest of the three gathering professions and will not change any time soon. Since the only people using Borean Leather are leatherworkers and with another new class diluting demand don't expect much to happen here.
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