This might be too deep in the thread, but I'd really like to see Blizzard say something, anything about the apparent item duping taking place in the last few months.
The Data clearly shows a massive increase in availability for certain items and my own personal experience is that of seeing nearly 24/7 trade chat spam by level 1 characters selling these rare mounts.
https://theunderminejournal.com/item.php?item=52200
https://theunderminejournal.com/item.php?item=49284
The silence from Blizzard concerning this has been deafening.