I couldn't find a list of hunter armor that could be bought on the auction house.
Im sure these will cost an arm and leg but here is what i have found so far (patch 5.2)
Head 522 Dreadrunner Helm Crafted
Head 476 Deadly Retinal Armor Crafted
Feet 522 Dreadrunner Sabatons Crafted
Chest 496 Raiment of Blood and Bone Crafted
Chest 476 Chestguard of Earthen Harmony Crafted
Hands 496 Raven Lord's Gloves Crafted
Hands 476 Gloves of Earthen Harmony Crafted
Wrists 496 Jagged Hornet Bracers BOE
Wrists 483 Jagged Hornet Bracers BOE
Legs 476 Legguards of Sleeting Arrows BOE
Necklace 476 Don Guerrero's Glorious Choker BOE
Finger 476 Perculia's Peculiar Signet BOE (unique)