In Wrath of the Lich King it is item level 213 and requires level 80. In MoP Classic it is item level 213, requires level 80 and sells to vendors for 1c.
In the Appearances collection, Deadly Gladiator's Chain Helm is listed as Vendor. Appearance ID: 10622. No other item uses this appearance, so it is unique to Deadly Gladiator's Chain Helm.
Read from the World of Warcraft client build files.
How Deadly Gladiator's Chain Helm Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Deadly Gladiator's Chain Helm suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Similar Items
The 10 items nearest to Deadly Gladiator's Chain Helm (item level 35) in item level among Armor > Mail, Head slot, from item level 32 to 37.
Items Numbered Next to Deadly Gladiator's Chain Helm
Blizzard numbers items as they are created, so the named items next to ID 41156 (41150 to 41162) were usually added in the same batch as Deadly Gladiator's Chain Helm: the same quest line, zone, vendor or reward set.