This item is acquired in-game. See its sources below.
A Rare Miscellaneous, item level 1.
First seen in build 12.0.7.68887 (Midnight (patch 12.0.7)).
Blizzard numbers items as they are created, so the named items next to ID 151269 (151261 to 151275) were usually added in the same batch as Naxxy: the same quest line, zone, vendor or reward set.
Renford's Letter ID 151261 · Quest "The parchment is stained, though the coloring matches not the ink with which it was penned, rather a dark,..."
Electrified Compression Shirt ID 151263 · Armor
Clunky Brawler's Purse ID 151264 · Consumable "Your share of the "winnings" and whatever was left on the brawl floor."
Blight Boar Microphone ID 151265 · Miscellaneous · item level 45
Exquisite Costume Set: "Xavius" ID 151268 · Miscellaneous "An intricate replica of Xavius, with attachable tail!"
Horse Tail Costume ID 151270 · Miscellaneous
Horse Head Costume ID 151271 · Miscellaneous
Knickknacks ID 151273 · Quest "Items of varying value that the vulpera have scavenged."
Salted Meats ID 151274 · Quest "Well preserved."
Worn Leather Satchel ID 151275 · Quest "Suitable for storing small and medium-sized items."The raw ItemSparse values for item 151269 in the current client build.
Read from the World of Warcraft client build files: Item, ItemSparse, Lock, Holidays, AreaTable and CollectableSourceVendor.
TheWoWDB