In The Burning Crusade it is item level 136 and requires level 70. In Wrath of the Lich King it is item level 136, requires level 70 and sells to vendors for 1c. In MoP Classic it is item level 136, requires level 70 and sells to vendors for 1c.
In the Appearances collection, Merciless Gladiator's Plate Shoulders is listed as Vendor. Appearance ID: 7917. No other item uses this appearance, so it is unique to Merciless Gladiator's Plate Shoulders.
Read from the World of Warcraft client build files.
How Merciless Gladiator's Plate Shoulders Compares
Who It Suits
Plate is the armor type Death Knight, Paladin and Warrior wear. With Strength or Intellect, Merciless Gladiator's Plate Shoulders suits Arms, Fury and Protection Warrior; Holy, Protection and Retribution Paladin; Blood, Frost and Unholy Death Knight.
Transmog Sets
Merciless Gladiator's Plate Shoulders is part of the transmog set Merciless Gladiator's Plate Armor (Warrior only). The other 7 pieces:
Items Numbered Next to Merciless Gladiator's Plate Shoulders
Blizzard numbers items as they are created, so the named items next to ID 30490 (30483 to 30500) were usually added in the same batch as Merciless Gladiator's Plate Shoulders: the same quest line, zone, vendor or reward set.
Pattern: ShadowclothID 30483 · Recipe · item level 27"Teaches you how to sew Shadowcloth."