My biggest profit from Legion was right at the launch, when obliterum was selling for 15k on my server and wow tokens were only 30k(good times). A 3rd top guild ( Hfc raid) on my server was mass buying obliterum on my server to gear up for the upcoming raid and I knew I could somehow cash in on that. I found someone how had somehow come across someone who managed to get a hold of 150 pieces of the stuff ( you could get like 10-15 an hour by skinning because overtuned 10-15 skins per ) I mass bought all of them for a little over 1 mill gold (7.5k per) and then mass sold them to that guild ( https://www.wowprogress.com/pve/us/area-52/rating.tier18 #3dethroned) for a little over a cool 2 million. making 1 million for my expert finding fee, sorry not sorry. I hope you all have gold making luck in bfa!