Sold a 130k transmog (that I'd farmed 2 days earlier) and 120k alchemy recipe (that I'd been reposting for 3 years).
Bought 10 Swift Springstriders at 2.7k each. Have resold 5 so far for an average of 30k each.
Discovered a few untapped markets (
this one, among others) that prove crafted transmog can be very lucrative.
Took advantage of my many level 90+ alts to create multiple Engineers, Tailors, and Alchemists. This has really boosted my profits from Bags, Sky Golems and Volatiles.
Also used several of these otherwise-unplayed alts to guarantee myself a slow but steady supply of
Spirits of Harmony, where I'm able to buy them at 1/3 or less of the market rate. This has been great for crafting Sky Golems, especially as the price of Trillium & Ghost Iron keeps rising.
Since January 2018, I've made an average of 1.5 million gold per month in sales. 1.5m is around the maximum amount of gold I ever held at one time before Legion. I just bought the Warframe mount (which is awesome) and I can't wait for my Brutosaur. Legion has been amazing for my gold making!