Sale 1: Aussie FaN (8.85 Keys)

https://backpack.tf/profiles/76561198141636088#!/compare/1531526400/1531612800

https://backpack.tf/profiles/76561198179023939#!/compare/1531526400/1531612800

High outlier.

Sale 2: Sold for 5 Keys

https://backpack.tf/profiles/76561198179023939#!/compare/1531526400/1531612800

Low outlier.

Sale 3: Sold for 3 Keys

https://backpack.tf/profiles/76561198044335614#!/compare/1531699200/1531785600

Low outlier.

Sale 4: Sold for 6 Keys

https://backpack.tf/profiles/76561198359061595#!/compare/1529280000/1529366400

https://backpack.tf/profiles/76561198202694983#!/compare/1529193600/1529280000

Sale 5: Sold for 3 Keys

https://backpack.tf/profiles/76561198202694983#!/compare/1532217600/1532304000

Low outlier.

Sale 5: Bulk sale.

https://backpack.tf/profiles/76561198806172553#!/compare/1531699200/1531872000 https://backpack.tf/profiles/76561198165055074#!/compare/1531699200/1531785600

Sale 6: Bulk sale.

https://backpack.tf/profiles/76561198165055074#!/compare/1533081600/1533168000 https://backpack.tf/profiles/76561198179015946#!/compare/1533081600/1533168000

Sale 7: bot.tf says 6 Keys + 2 Refined

https://backpack.tf/profiles/76561198303830628#!/compare/1528848000/1529107200

https://backpack.tf/profiles/76561198312583107#!/compare/1529020800/1529107200

Can’t prove this sale. Ignoring.

Sale 8: Sold for 6 Keys

https://backpack.tf/profiles/76561198312583107#!/compare/1532390400/1532476800

Sale 9: Sold for 6 Keys

https://backpack.tf/profiles/76561198334598690#!/compare/1532563200/1532649600

Sale 10: Bulk purchase

https://backpack.tf/profiles/76561198340437816#!/compare/1532131200/1532304000

Sale 11: Sold for 5 Keys

https://backpack.tf/profiles/76561198136425253#!/compare/1525651200/1528761600

Low outlier.

Sale 12: Sold for $16 when Keys were ~$1.94 each

https://marketplace.tf/items/1106;5;u3009

16 / 1.94 = 8.247 Keys. High outlier.