History 1: https://backpack.tf/item/9535692159

Untraceable:

https://backpack.tf/profiles/76561199085116273#!/compare/1610409600/1610496000

https://backpack.tf/profiles/76561198257809473#!/compare/1610409600/1610496000

History 2: https://backpack.tf/item/7408429160

Only this matches https://imgur.com/mb57FVt

https://backpack.tf/profiles/76561199085116273#!/compare/1604102400/1604188800

https://backpack.tf/profiles/76561198059979072#!/compare/1561852800/1606262400

More must have been involved, nothing traceable in buyer's compare

History 3: https://backpack.tf/item/6475811732

tradebacks

History 4: https://backpack.tf/item/4915509643

Untraceable, the 11 keys don't seem to match:

https://backpack.tf/profiles/76561198093799835#!/compare/1610409600/1610496000

https://backpack.tf/profiles/76561198375674224#!/compare/1609027200/1610409600

History 5: https://backpack.tf/item/4076128775

Marketplace.tf sale

History 6: https://backpack.tf/item/3291558992

Deposit to BitSkins

Marketplace.tf sale: https://marketplace.tf/items/tf2/463;5;u3009

December 13: $25/1.92=13.02 ~13 keys

Only usable sale is 13 keys, going 13 flat