In Wrath of the Lich King it is item level 166, requires level 76 and sells to vendors for 5g 1s 27c. In MoP Classic it is item level 166, requires level 76 and sells to vendors for 5g 1s 27c.
In the Appearances collection, Turtle-Minders Robe is listed as Vendor. Appearance ID: 11162. No other item uses this appearance, so it is unique to Turtle-Minders Robe.
Read from the World of Warcraft client build files.
How Turtle-Minders Robe Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Turtle-Minders Robe suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Turtle-Minders Robe is part of the transmog set Satin Battlegear (Priest only). The other 14 pieces:
Blizzard numbers items as they are created, so the named items next to ID 44062 (44057 to 44067) were usually added in the same batch as Turtle-Minders Robe: the same quest line, zone, vendor or reward set.