Item 1

https://backpack.tf/item/5274929243

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198133991629#!/compare/1689292800/1691712000

Buyer: https://backpack.tf/profiles/76561199032721186#!/compare/1690070400/1690156800

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561198280524116#!/compare/1690156800/1690243200

Buyer: https://backpack.tf/profiles/76561198124841470#!/compare/1691539200/1693440000

Item 2

https://backpack.tf/item/5234743724

Sale #3

Untraceable?-

Seller: https://backpack.tf/profiles/76561198295525116#!/compare/1695168000/1695254400

Buyer: https://backpack.tf/profiles/76561198061836787#!/compare/1695168000/1695254400

Item 3

https://backpack.tf/item/2972458246

Sale #4

Sold for 20 keys (Keys on buyer's side match 22 keys + 35.33 refined but the sell order was at 20 keys)-

Seller: https://backpack.tf/profiles/76561198178426383#!/compare/1694131200/1694563200

Buyer: https://backpack.tf/profiles/76561198883149330#!/compare/1694390400/1694476800

Sell Order: https://gladiator.tf/time-machine?item=Infernal%20Flames%20Taunt:%20I%20See%20You&at=2023-09-08T05:11:45.000Z

Sale #5

Untraceable-

Seller: https://backpack.tf/profiles/76561198883149330#!/compare/1695254400/1695340800

Buyer: https://backpack.tf/profiles/76561198079297205#!/compare/1694995200/1695772800

Sale #6

Untraceable-

Seller: https://backpack.tf/profiles/76561198079297205#!/compare/1695772800/1696118400

Buyer: https://backpack.tf/profiles/76561198841031804#!/compare/1695686400/1696118400

Sale #7

Sold for 16 keys (ID "13610001794" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198841031804#!/compare/1696118400/1696377600

Buyer: https://backpack.tf/profiles/76561198016453384#!/compare/1646179200/1696377600

Marketplace.tf Sales

https://marketplace.tf/items/tf2/1116;5;u3015

MP.TF Sale #1

Sold for $23.99 on August 17, 2023

Average Key Price @ $2.02ish

23.99/2.02 = 11.87ish keys

Unknown History

MP.TF Sale #2

Sold for $33.33 on October 8, 2023

Average Key Price @ $2.02ish

33.33/2.02 = 16.5ish keys

https://backpack.tf/item/2989834693

MP.TF Sale #3

Sold for $33.33 on October 10, 2023

Average Key Price @ $2.03ish

33.33/2.03 = 16.41ish keys

https://backpack.tf/item/5234743724

Sales @ 12, 16, 16, 17, 20

Taking 12-20 here