In Wrath of the Lich King it is item level 226, requires level 80 and sells to vendors for 7g 29s 40c. In MoP Classic it is item level 213, requires level 80 and sells to vendors for 7g 51s 47c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Esteemed Bindings Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Esteemed Bindings suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Blizzard numbers items as they are created, so the named items next to ID 40323 (40318 to 40328) were usually added in the same batch as Esteemed Bindings: the same quest line, zone, vendor or reward set.