What? I said I giggled because he both cautioned people away from saturated markets and then pointed them to saturated markets. It had nothing to do with the sell rate of Golems since whether or not they sell quickly wasn't an issue. I was calculating for monthly profit, based on OPs example. In the case of an item that each toon can only make one of in a given month it doesn't matter how fast they sell since whether it sells on day 1 or day 20 it doesn't change how many more you can make on that toon.
Although WoW currency can be found through quests, fallen enemies or the dreaded "farming" process, doing it the conventional way is time-consuming. Considering the upcoming release of the Legion expansion pack in August of 2016, stocking up on gold is more important than ever. This way, you can spend less time farming and more time buying everything you need to tackle the next set of challenges.
Mythic+ rewards will also go up by 30 item levels; however, during the first week of Season 2, rewards from end-of-run chests will be capped at Mythic 6 quality (item level 385), and the chest you open next week will contain Season 1 rewards if you do a Mythic+ run this week. (So, for example, if you do a Mythic 10 during the final week of Season 1, you’ll get a Season 1 item level 380 piece and 60 Residuum from your first Season 2 chest.)