I’ve been farming the PVP Killer set and bought the Hat, chest, boots, and gloves from the store. However, after buying those pieces, the pants/bottoms have disappeared from the store. The item does not show up in my transmog cabinet and neither of the vendors in either location have the pants/bottoms in stock.
Any help is appreciated! Thanks!
Upvote. Same thing happened to me… Just bought Vest, learned it, then the hands disappeared from the purchase menu.
I am having this same problem with the gloves, too.
Also, I bought this stuff on my necromancer, which doesn’t have a helm piece for this set. Because of this, I cannot even use the helm transmog I bought on my necro and have to level another character to 80 to do so.
Agreed - The same thing happened to me. I can no longer buy the gloves.
Same thing happened to me.
Happened to me today to 
Same for me. Missing pants and I can’t buy it now.
Edit: it showed up for me after some time. (had to turn off and turn on the game)
Same deal here. Cant get the pants. It is actually absurd that we can’t submit tickets to get things fixed…