Okay there's a few more sales now.

Sold for a Something Burning This Way Comes L'Inpsecteur(63 Keys)

http://backpack.tf/profiles/76561198079639768#!/compare/1464739200/1464825600

http://backpack.tf/profiles/76561198262713274#!/compare/1464739200/1464825600

http://backpack.tf/item/2731302172

Added 8 Keys for a Frostbite Hermes(70 Keys)(62 Keys total)

http://backpack.tf/profiles/76561198191864918#!/compare/1464739200/1464825600

http://backpack.tf/profiles/76561198079639768#!/compare/1464739200/1464825600

http://backpack.tf/item/2731302172

Sold for 46 Keys, Outlier

http://backpack.tf/profiles/76561198135388328#!/compare/1464739200/1464825600

Sold with ~13 Keys in Sweets for a Death at Dusk Your Worst Nightmare(95 Keys)(82 Keys total, Outlier)

http://backpack.tf/profiles/76561198162450501#!/compare/1464739200/1464825600

Sold with a Dead Presidents Stainless Pot(14 Keys) and a Smoking Demoman's Fro(12.5 Keys, rounding to 13) for a Circling Heart Voodoo Juju(Slight Return)(87 Keys) and 1 Key in metal(61 Keys total)

http://backpack.tf/profiles/76561198218613716#!/compare/1462320000/1462579200

46 is low and 82 is high, 61-63 Keys should be fine.

Additional Proof/Counter-Proof/Constructive Criticism/Feedback is always appreciated.