Item 1

https://backpack.tf/item/5009466310

Sale #1

Sold for 10 keys (ID "13738317794" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198086948995#!/compare/1698624000/1698710400

Buyer: https://backpack.tf/profiles/76561198080301085#!/compare/1698624000/1698710400

Item 2

https://backpack.tf/item/7956669030

Sale #2

Dumped for an unknown amount-

Seller: https://backpack.tf/profiles/76561199245733895#!/compare/1696896000/1696982400

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1696982400/1697068800

Sale #3

Untraceable?-

Seller: https://backpack.tf/profiles/76561199026390261#!/compare/1699833600/1699920000

Buyer: https://backpack.tf/profiles/76561198145331385#!/compare/1699920000/1700006400

Sale #4

Gambled or deposited to a website?-

Seller: https://backpack.tf/profiles/76561198145331385#!/compare/1700352000/1700438400

Buyer: https://backpack.tf/profiles/76561199282806340#!/compare/1698796800/1700956800

MP.TF Sale #1

Sold for $17.99 on October 6, 2023

Average Key Price @ $2.02ish

17.99/2.02 = 8.90ish keys

Unknown History?

https://marketplace.tf/items/tf2/30360;5;u12

Sales @ 8.9, 10

Rounding and taking 9-10 here :3