https://backpack.tf/item/4280388818 - 1 Sale

Sold for 48 Keys:

https://backpack.tf/profiles/76561198882066402#!/compare/1724371200/1724457600 (seller)

https://backpack.tf/profiles/76561198064490192#!/compare/1724284800/1724457600 (buyer, untrace)

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https://marketplace.tf/items/tf2/36;14;kt-3

Jun 24: $89.99 = 55 Keys with Keys at $1.64

Aug 29: $89.99 = 49 keys with Keys at $1.84

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https://backpack.tf/item/2919055046 - Bulk 2x

https://backpack.tf/item/2648258127 - Bot sale into redump (their selling price is wrong on the item page, the bot page shows the actual listing price at 53)

https://backpack.tf/item/9228668873 - Bulk

Sales at 48, 49, 55.

Classifieds: https://imgur.com/uTlTr8W (buyer at 37)

https://backpack.tf/suggestion/66efcccbac943cbefb08f5b6#comment-66f6617bbec2e3993306693a

Additional sale at 55 courtesy of Mindacos, taking his advised range of 48-55.