In The Burning Crusade it is item level 159 and requires level 70. In Wrath of the Lich King it is item level 159, requires level 70 and sells to vendors for 1c. In MoP Classic it is item level 159, requires level 70 and sells to vendors for 1c.
Read from the World of Warcraft client build files.
How Brutal Gladiator's Wyrmhide Helm Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Brutal Gladiator's Wyrmhide Helm suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Items Numbered Next to Brutal Gladiator's Wyrmhide Helm
Blizzard numbers items as they are created, so the named items next to ID 35112 (35107 to 35119) were usually added in the same batch as Brutal Gladiator's Wyrmhide Helm: the same quest line, zone, vendor or reward set.