Suggestion 50. Squad 1.

Sales

Sold for 11 keys + 19 refined

https://backpack.tf/profiles/76561198195933333#!/compare/1602288000/1602374400

https://backpack.tf/profiles/76561199070403543#!/compare/1602288000/1602374400

Sold to buyorder

https://backpack.tf/profiles/76561198171448801#!/compare/1602288000/1602374400

https://backpack.tf/profiles/76561198195933333#!/compare/1602201600/1602288000

Untrace

https://backpack.tf/profiles/76561198436103721#!/compare/1603238400/1603324800

https://backpack.tf/profiles/76561198219926077#!/compare/1603152000/1603238400

Marketplace sales

https://marketplace.tf/items/tf2/30091;5;u62

$35 on October 21 (35/1.86 = 19~)

https://manic.tf/keyprice/?at=2020-10-21

https://backpack.tf/item/7957339351

$20.93 on October 24 (20.93/1.86 = 11~)

https://manic.tf/keyprice/?at=2020-10-24

https://backpack.tf/item/7955651489

$35 on November 12 (35/1.79 = 20~)

https://manic.tf/keyprice/?at=2020-11-12

$35 on November 24 (35/1.75 = 20)

https://manic.tf/keyprice/?at=2020-11-24

https://backpack.tf/item/7957339351

Summary

Sales are at buyorder, 11, 11, 19, 20, and 20.

Conclusion

So that makes 3 sales at around 11~, and 3 sales at around 20.

I dislike ranges like this, but it seems fair to include both sides here.

Going with 11-20 here.