Sale 1: Untrace:

https://backpack.tf/profiles/76561198267522704#!/compare/1608940800/1613088000

+

https://backpack.tf/profiles/76561198178372977#!/compare/1600128000/1619481600

(Avaliable compares are extremely wide in range, so future sales may be present as well here)

Sale 2: Untrace: (Keys here are from a different trade)

https://backpack.tf/profiles/76561198178372977#!/compare/1618790400/1619222400

+

https://backpack.tf/profiles/76561198319798435#!/compare/1618704000/1618963200

Strange's bot seems to have paid 12 keys for this, according to histories here.

https://backpack.tf/profiles/76561198178372977#!/compare/1618790400/1619222400

Pretty Odd to see it seemingly go through another person for the second sale.

Sale 3: Untrace

https://backpack.tf/profiles/76561198319798435#!/compare/1618876800/1618963200

+

https://backpack.tf/profiles/76561198390770929#!/compare/1618790400/1618963200

Going With 12 flat here.