History 1: https://backpack.tf/item/8387161952

Untraceable:

https://backpack.tf/profiles/76561198274797164#!/compare/1608768000/1609113600

https://backpack.tf/profiles/76561198142873343#!/compare/1608768000/1609027200

History 2: https://backpack.tf/item/8334597881

Tradebacks, currently deposited to Mannco.store

History 3: https://backpack.tf/item/6252804138

looks like a Marketplace.tf sale

Marketplace.tf sales: https://marketplace.tf/items/tf2/30842;5;u3031

December 1: $9.25/1.76=5.26 ~5 keys

December 4: $14/1.76=7.95 ~8 keys

Generic buyers up to 6.28 keys. Buyers for this effect range from 6.39-6.65 keys.

Therefore 5 is definitely a low outlier, it most likely was sold to a buy order too

Let's try 8 flat