https://marketplace.tf/items/30958;5;u9

https://backpack.tf/item/6469534622 - 36 sale

36 and 38 keys

https://backpack.tf/profiles/76561198310171759#!/compare/1526947200/1527033600

TF Logo Herald's (17 keys: https://marketplace.tf/items/30769;5;u11) + 6 keys = 23 keys

https://backpack.tf/profiles/76561198813270454#!/compare/1528502400/1529020800

22 keys

https://backpack.tf/profiles/76561198282632414#!/compare/1529020800/1529971200

Screaming Pool Party (20-25 keys: https://marketplace.tf/items/30570;5;u3006) + 7 keys + Warpaint (6) = 36 keys

Warpaint:

https://steamcommunity.com/market/listings/440/Strange%20Sax%20Waxed%20War%20Paint%20%28Minimal%20Wear%29 - 6 keys (twice)

https://backpack.tf/profiles/76561198077251918#!/compare/1529798400/1529884800

Bulk

https://backpack.tf/profiles/76561198218497692#!/compare/1532304000/1532390400

https://backpack.tf/profiles/76561198396975934#!/compare/1528848000/1532390400

Better there, supports range

https://backpack.tf/profiles/76561198396975934#!/compare/1532736000/1532908800

https://backpack.tf/profiles/76561198056793444#!/compare/1532822400/1532908800

KaW Caribou (35)

Caribou:

https://backpack.tf/profiles/76561198396975934#!/compare/1532908800/1532995200 - Vivid Hoodie (28: https://i.imgur.com/3O6w0QY.png) + Strike Carlton (7) = 35 keys

https://backpack.tf/profiles/76561198315299926#!/compare/1534204800/1534291200

Added 26 keys for Scorching Robin (45) = 19, countered by buyer

Summary

Sales at: 22, 23, 35, 36, 36, 38