Yarley

Yarley is a level 65 armor vendor located inside the Caverns of Time in Tanaris.

See Caverns of Time NPCs.

History
From what he used to say, Yarley is from the future, however, he somehow got transported back in time, and now is affraid to leave the caverns of time in fear of creating a temproal paradox, he offers to fix armor, as he says that he used to be a blacksmith in a past life

Trivia
His name sounds almost like ya'rly. See also Auctioneer Yarly, O'Reily, and Auctioneer O'reely for this trend.