Oh My, im doing unusual suggestions AGAIN.

Sale #1 - Untrace?

https://backpack.tf/profiles/76561198070736816#!/compare/1539648000/1539734400

https://backpack.tf/profiles/76561198131661139#!/compare/1539734400/1539820800

Sale #2 - Untrace?

https://backpack.tf/profiles/76561198193246751#!/compare/1539388800/1540252800

https://backpack.tf/profiles/76561198131661139#!/compare/1539907200/1540080000

Sale #3 - 8 keys

https://backpack.tf/profiles/76561198021206951#!/compare/1542931200/1543017600

https://backpack.tf/profiles/76561198118922746#!/compare/1542931200/1543017600

Sale #4 - Sold With 8 Ref For Showstopper Russian Arms Race (7) + 3 Keys

https://backpack.tf/profiles/76561198118922746#!/compare/1542931200/1543017600

https://backpack.tf/profiles/76561198335337587#!/compare/1542844800/1543017600

Taking 10 - 0.19 = 9.8, rounded to 10 keys

Sale #5 - Sold With Buds For Blizzardy Storm Brain-Warming Wear + 37.33~ ref in hats

https://backpack.tf/profiles/76561198335337587#!/compare/1543536000/1543622400

https://backpack.tf/profiles/76561198110834357#!/compare/1543536000/1543622400

Taking 10 + 0.89 - 2.65 = 8.21

Brain Micro

10 keys

https://backpack.tf/profiles/76561198067741299#!/compare/1537833600/1537920000

https://backpack.tf/profiles/76561198208077429#!/compare/1537833600/1537920000

Sale #6 - 4 keys 28 ref? (only 4 id's match on the keys, guessing it was a quicksale)

https://backpack.tf/profiles/76561198110834357#!/compare/1543708800/1543795200

https://backpack.tf/profiles/76561197999873164#!/compare/1543622400/1543708800

Excluding

Sale #1 - 3, Reason, Untrace

Sale #6, Reason, Untrace / Quicksale

Overall Taking

8 - 10 keys