There is an interesting WoW Transmog Cheat, which is not very well known. It will allow you to purchase an item from any vendor, even those for honor, valor, justice, Darkmoon Faire, or any other for that matter. Transmog an item to look like the item you purchased, then return said item for a full refund. If you ever wanted to take a crappy set of armor, and make it look like something special, but didn't want to actually farm up the entire set, this is the way to do it.
WoW Transmog Cheat confirmed working on patch 6.x for US and EU!