In Wrath of the Lich King it is item level 200 and requires level 80. In MoP Classic it is item level 200, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files.
How Hateful Gladiator's Linked Helm Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Hateful Gladiator's Linked 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 Hateful Gladiator's Linked Helm (item level 35) in item level among Armor > Mail, Head slot, from item level 31 to 37.
Items Numbered Next to Hateful Gladiator's Linked Helm
Blizzard numbers items as they are created, so the named items next to ID 41149 (41142 to 41155) were usually added in the same batch as Hateful Gladiator's Linked Helm: the same quest line, zone, vendor or reward set.