None of those are particularly rare, but at least I managed to get the bfa dungeon meta one, and 400 mounts achievement finally Also remembered that I can buy a 500k mount from the same guy who sells the 5 mil one.
Also bought the 100k pet and got Kovok from Paragons of the Klaaxi while farming for the garrosh mount. Funny thing is that Kovok took 161 tries in total, which is more than I had to farm for most of my mounts, and the pet is like 7k on AH.