Okay rogues, you may already know that you can shadowstep to the horde aucitoneers in orgrimmar and kill them. However me and a friend today kept them dead for almost an hour without even the use of vanish by hiding behind a box on the platform and breaking LOS from enemy horde. From there we killed off the guards that would spawn when we killed the auctioneers and we could re-stealth.
The screenshot shows the box you can hide behind and restealth.
No horde except for pets will be able to attack you there. Spell AOE, hunter flare, and so on cannot hit you here. After that you can kill off the auctioneers again.
I recommend you go with another rogue because you'll have to kill 3 guards initially + any that spawn from the auctioneers. And probably alot of hunter pets. Enjoy