Sale 1: Untraceable

https://backpack.tf/profiles/76561198118973332#!/compare/1495324800/1495584000

Sale 2: Sold for Eerie Orbiting Fire A Rather Festive Tree (33) --> 33 keys

https://backpack.tf/profiles/76561198090520837#!/compare/1496188800/1496275200

Sale 3: 22 keys pure; QS sold within 4 days

https://backpack.tf/profiles/76561198043936328#!/compare/1498348800/1498435200

Sale 4: Sold together with Courtier's Collar (0.5 keys) for Green Energy Brain Bucket (32) (the 3 keys were not part of the trade according to history) --> 31.5; rounding to 32

https://backpack.tf/profiles/76561198269186633#!/compare/1499644800/1499990400

https://backpack.tf/profiles/76561198324836304#!/compare/1499904000/1499990400

Sales at 22, 32, 33. No seller on backpack Suggesting range from 32-33.