Item 1

https://backpack.tf/item/4087996734

Sale #1

Untraceable-

Seller: https://backpack.tf/profiles/76561198135388328#!/compare/1683763200/1683849600

Buyer: https://backpack.tf/profiles/76561198453530349#!/compare/1683763200/1683849600

Sale #2

Untraceable-

Seller: https://backpack.tf/profiles/76561198453530349#!/compare/1683849600/1683936000

Buyer: https://backpack.tf/profiles/76561198354459626#!/compare/1683849600/1683936000

Sale #3

Untraceable-

Seller: https://backpack.tf/profiles/76561198354459626#!/compare/1683849600/1683936000

Buyer: https://backpack.tf/profiles/76561198266342588#!/compare/1672704000/1690070400

Sale #4

Bulk for something, untraceable-

Seller: https://backpack.tf/profiles/76561198266342588#!/compare/1672704000/1690070400

Buyer: https://backpack.tf/profiles/76561199026390261#!/compare/1690416000/1690502400

Item 2

https://backpack.tf/item/3937319011

Sale #5

Sold for 31 keys (taunt doesn't show up in the seller's compare tho and ID "13119892934" of the unusual match)-

Seller: https://backpack.tf/profiles/76561198164651434#!/compare/1686009600/1686096000

Buyer: https://backpack.tf/profiles/76561198841279602#!/compare/1686009600/1686096000

Marketplace.tf Sales

https://marketplace.tf/items/tf2/1110;5;u3038

MP.TF Sale #1

Sold for $61.66 on June 15, 2023

Keys @ $1.99

61.66/1.99 = 30.98ish keys

MP.TF Sale #2

Sold for $53.22 on July 22, 2023

Keys @ $1.95

53.22/1.95 = 27.29ish keys

Sales @ 27, 31, 31

Taking 27-31 here