Item 1

https://backpack.tf/item/7957357905

Sale #1

Sold for 22 keys (all other unusuals have matching IDs to a group of keys, the Guadalajara "13127755069" to 40 keys, the Panama "13126515803" to 90 keys, the Softcap "13126672622" to 22 keys, and the Brain-Warming "13126491218" to 29 keys)-

Seller: https://backpack.tf/profiles/76561199128620418#!/compare/1686182400/1686268800

Buyer: https://backpack.tf/profiles/76561198443298608#!/compare/1677801600/1688342400

Marketplace.tf Sales

https://marketplace.tf/items/tf2/98;5;u61

MP.TF Sale #1

Sold for $80 on July 31, 2023

Keys @ $1.95

80/1.95 = 41.03ish keys

MP.TF Sale #2

Sold for $80 on August 11, 2023

Keys @ $2

80/2 = 40 keys

Sales @ 22, 40, 41

Taking 40-41 here