Vengeful Gladiator's Vestments

Vengeful Gladiator's Vestments is the Arena Season 3 set for Rogues.

Source
This set is sold by at Area 52 in Netherstorm for.

Trivia

 * Vengeful Gladiator's Vestments is an Epic Arena Armor Set card in the World of Warcraft: Trading Card Game's Drums of War set.