In Wrath of the Lich King it is item level 245 and requires level 80. In MoP Classic it is item level 245, requires level 80 and sells to vendors for 1c.
Items Numbered Next to Relentless Gladiator's Mutilator
Blizzard numbers items as they are created, so the named items next to ID 42257 (42252 to 42264) were usually added in the same batch as Relentless Gladiator's Mutilator: the same quest line, zone, vendor or reward set.