History 1: (spec ks) https://backpack.tf/item/4078180087

Sold on Marketplace.tf: https://marketplace.tf/items/tf2/310;14;kt-2

December 4: $14.99/1.76=8.52 keys ~8.5

History 2: (pro ks) https://backpack.tf/item/4015466682

Bulk transfer

https://backpack.tf/profiles/76561198342136112#!/compare/1608940800/1609027200

History 3: (spec ks) https://backpack.tf/item/3587423572

Bulk transfer

https://backpack.tf/profiles/76561198342136112#!/compare/1608940800/1609027200

History 4: https://backpack.tf/item/3398076574

Tradebacks

History 5: (basic ks) https://backpack.tf/item/2991698380

Sold on Marketplace.tf: https://marketplace.tf/items/tf2/310;14;kt-1

December 4: $12.95/1.76=7.36 keys ~7.35

History 6: https://backpack.tf/item/2960710082

Untraceable:

https://backpack.tf/profiles/76561198057418972#!/compare/1609372800/1609804800

https://backpack.tf/profiles/76561198115721685#!/compare/1609286400/1609372800

History 7: (pro ks) https://backpack.tf/item/2940074443

Sold on Marketplace.tf: https://marketplace.tf/items/tf2/310;14;kt-3

November 3: $19.99/1.82=10.98 keys ~11

History 8: https://backpack.tf/item/2886541446

Bulk:

https://backpack.tf/profiles/76561198310811821#!/compare/1609113600/1610236800

https://backpack.tf/profiles/76561198292137994#!/compare/1610236800/1610323200

History 9: https://backpack.tf/item/2868505912

Sold on Mannco.store: https://mannco.store/item/15244

January 2: $11.01/1.84=5.98 keys ~6

History 10: https://backpack.tf/item/2428380625

Tradebacks

Other sales not mentioned above: https://marketplace.tf/items/tf2/310;14

November 16: $12.79/1.77=7.23 keys ~7.25

November 28: $12.83/1.76=7.29 keys ~7.3

January 20: $19.9/2.1=9.48 keys ~9.5

https://steamcommunity.com/market/listings/440/Collector%27s%20Warrior%27s%20Spirit?filter=collectors

December 31 1 AM: $15/2.39=6.27 keys ~6.25

January 8 9 PM: $23.38/2.45=9.54 keys ~9.55

January 18 12 AM: $24.21/2.42=10 keys

https://steamcommunity.com/market/listings/440/Collector%27s%20Professional%20Killstreak%20Warrior%27s%20Spirit?filter=collectors (pro ks)

November 29 2 AM: $21.96/2.24=9.8 keys

December 5 2 AM: $21.88/2.1710.08 keys ~10.1

December 18 2 AM: $50.01/2.22=22.52 keys ~22.5

Sales at 6, 6.25, 7.25, 7.3, 7.35, 8.5, 9.5, 9.55, 9.8, 10, 10.1, 11, 22.5

6-6.25 looks low given they're around the SCM buy order price

10.1, 11 and 22.5 happened on Pro KS ones, therefore they're high

7.25-10 should be reasonable (10 was a non KS one)