In Wrath of the Lich King it is item level 258, requires level 80 and sells to vendors for 10g 91s 16c. In MoP Classic it is item level 245, requires level 80 and sells to vendors for 10g 91s 16c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Dragonstalker's Helm Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Dragonstalker's Helm suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Dragonstalker's Helm is part of the transmog set Dragonstalker Armor (Hunter only). The other 9 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Dragonstalker's Helm Fits
Other Items Named Dragonstalker's Helm
1 other item in the current build is also called Dragonstalker's Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 49480 (49475 to 49485) were usually added in the same batch as Dragonstalker's Helm: the same quest line, zone, vendor or reward set.