I logged out with 15x these gems in for 800g each, sold 20 so far at 1k a pop until the prices dropped a bit. I was surprised to see them all returned to mailbox so I check Ah and I am confronted with this nonsence.
This is one of the only things in wow that genuinely frustrates and makes me irratated IRL.
undercut by 1c or at most 1g, and worst of all don't undercut YOURSELF. Take the time to set up your auction addons so that you don't repeat this guys mistakes.