Because I made a mistake, this thread is solely for the poll. Sorry for the inconvenience. For the real auction(on the level 3 unbreaking pick, go to: http://empireminecraft.com/threads/diamond-pickaxe-full-health-unbreaking-iii-3.4365/
I thought the effect of efficiency was to increase the speed of mining, Unbreaking reduces the damage.
It is unbreaking 3! Sorry I typed the wrong name. Thanks josh! The unbreaking 3 diamond pickaxe is being auctioned at http://empireminecraft.com/threads/diamond-pickaxe-full-health-unbreaking-iii-3.4365/