Your server population may determine how much profit you can make. Lower population servers generally have lower prices in the AH as there is less demand, but rare items or recipes can really make a profit as they are harder to come by. Higher population servers have a higher demand. However, they are more likely to have a flooded market, which makes items hard to sell, especially in the case of low-level gathering professions.
Once your auctioning operation reaches a certain size a second account becomes an invaluable tool. It will allow you to run auctioning scans, shopping scans and collect mailboxes while playing your main. I strongly suggest buying a second monitor as well. This will help you really unlock the benefit of a second account. For a detailed guide on why and how to set it up check out my post on the subject.

In World of Warcraft: Battle for Azeroth for PC, there will be a stat squish and item squish to lower the numbers used in the game, an example being a legendary item scaled for Antorus: The Burning Throne (the final raid for Legion) being reduced from item level 1000 to 330. Unique buffs are added back; these buffs are class specific which are mages’ Arcane Brilliance, druids’ Mark of the Wild, etc. Titanforging—something that allows for an item to be more powerful than normal—is still in World of Warcraft: Battle for Azeroth for PC; however, if the item is one of those affected by the Heart of Azeroth, then that item cannot be titanforged.

Your server population may determine how much profit you can make. Lower population servers generally have lower prices in the AH as there is less demand, but rare items or recipes can really make a profit as they are harder to come by. Higher population servers have a higher demand. However, they are more likely to have a flooded market, which makes items hard to sell, especially in the case of low-level gathering professions.
I guess maybe I'm familiar enough with it to just slam it out. I don't recall any low droprate quests as bad as 5%. Although Blizzard has been screwing with stuff lately. Do you remember which quest it was? A lot of those can be skipped if they're too tedious. Like literally ALL the quests on that little island in the NE corner of the map with the ghost pirates underwater and the dragon whelps.
Unless low quality items have some known quest use or are coveted by other players, you should try to sell it as soon as possible to create bag space. Always (or almost always, see above exceptions) keep things like cloth, leather, herbs, or large stacks of white/gray items over other loot when you have to decide what to keep when your bags get full. It might be worth your while to invest in larger bags (10-20 slot), especially if you know a tailor.
The upcoming raid, Battle of Dazar’Alor, tackles this problem by having the Horde and Alliance have two raid stories — and the opposite faction will temporary flip sides for flashbacks that show the whole story. The Alliance storm the Zandalar capital and gain a massive upper hand in the war. From there, the writers will have to balance a compelling Alliance story with the rising threat of the Old Gods (and, of course, the ongoing Horde story.) 
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