Dead

https://backpack.tf/item/10506007091

Sale 1: 12 keys

Buyer: https://backpack.tf/profiles/76561198252355666#!/compare/1629590400/1630281600

Seller: https://backpack.tf/profiles/76561198355520251#!/compare/1630195200/1630281600

Sale 2: Untrace (32 ref matches)

Buyer: https://backpack.tf/profiles/76561198355520251#!/compare/1629504000/1629590400

Seller: https://backpack.tf/profiles/76561198311498888#!/compare/1629504000/1629590400

Sale 3: Untrace

Buyer: https://backpack.tf/profiles/76561198311498888#!/compare/1628380800/1628467200

Seller: https://backpack.tf/profiles/76561198045708542#!/compare/1628380800/1628467200

https://backpack.tf/item/9175916957

Sale 4: Untraces

Buyer: https://backpack.tf/profiles/76561198311498888#!/compare/1631836800/1635984000

Seller: https://backpack.tf/profiles/76561198893290498#!/compare/1631750400/1635984000

Sale 5: Untrace

Buyer: https://backpack.tf/profiles/76561198893290498#!/compare/1623196800/1630627200

Seller: https://backpack.tf/profiles/76561198252442712#!/compare/1629158400/1629936000

Sales 6 & 7: $18.49 and $19.99 on marketplace https://marketplace.tf/items/tf2/31114;5;u60

18.49/1.81 = 10.22 (rounds to 10k), 19.99/1.84 = 10.86 (rounds to 11k)

https://backpack.tf/item/9141103507

Sale 8: Untrace

Buyer: https://backpack.tf/profiles/76561198041437691#!/compare/1632960000/1633219200

Seller: https://backpack.tf/profiles/76561199102199351#!/compare/1632960000/1633046400

Sale 9: 8k 15ref (below buyers)

Buyer: https://backpack.tf/profiles/76561199102199351#!/compare/1632873600/1632960000

Seller: https://backpack.tf/profiles/76561198254676106#!/compare/1632873600/1632960000

Other mp sale from sale 6,7

Sale 10: Untrace

Buyer: https://backpack.tf/profiles/76561199132665029#!/compare/1630627200/1631836800

Seller: https://backpack.tf/profiles/76561198258776198#!/compare/1630627200/1636416000

Sales at 8.25 (ignored) , 10, 11, 12. Taking 10-12.