I saw this brought up in the General Community Forum and figured it should have its own suggestion post.
This is a link to the original conversation; https://octowow.st/forum/viewtopic.php?t=1882
Essentially it appears that on July 21st Octo put out a patch that lowered the drop rate of Sulfuron Ingots considerably from what they were on Turtle. https://octowow.st/forum/viewtopic.php?t=1013 I'm not sure we know the precise drop rate but it seems people assume 30%.
This has caused what I feel is likely an unintended consequence that should probably be looked at. My first thought when I saw the conversation is that it couldn't be as bad as they're describing. When I looked into it myself I found that there were absolutely no Sulfuron Ingots on the Auction House, and when I asked in world chat what they're selling for I immediately had someone offer me 500g for one. They assumed / hoped I was looking to sell one.
That's a pretty bleak market considering the cost of many other items currently.
I feel that maybe the rates were higher on Turtle because of the increased demand due to True Band of Sulfuras?
The demand for them stays relatively consistent as their two main uses are going to be desired even through to Kara40 progression so I doubt the market will correct much.
Just my two cents.