In Wrath of the Lich King it is item level 226, requires level 80 and sells to vendors for 3g 97s 93c. In MoP Classic it is item level 200, requires level 80 and sells to vendors for 3g 97s 93c.
In the Appearances collection, Agonal Sash is listed as Boss Drop. Appearance ID: 10068. No other item uses this appearance, so it is unique to Agonal Sash.
Read from the World of Warcraft client build files.
Where Agonal Sash Comes From
Agonal Sash Drops From
The in-game Adventure Guide lists Agonal Sash in the loot of 2 encounters.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Agonal Sash Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Agonal Sash suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Similar Items
The 10 items nearest to Agonal Sash (item level 35) in item level among Armor > Cloth, Waist slot, from item level 31 to 38.
Blizzard numbers items as they are created, so the named items next to ID 39190 (39182 to 39195) were usually added in the same batch as Agonal Sash: the same quest line, zone, vendor or reward set.