Noice

Item 1: https://backpack.tf/item/4003381937

Sale 1:

https://backpack.tf/profiles/76561198340848973#!/compare/1635984000/1636156800

https://backpack.tf/profiles/76561198063640894#!/compare/1635984000/1636156800

Looks like Bulk, unusable

Item 2: https://backpack.tf/item/8510467803

Sale 1:

https://backpack.tf/profiles/76561199028655581#!/compare/1636070400/1636156800

https://backpack.tf/profiles/76561198002757046#!/compare/1636070400/1636156800

Looks like ~56 based on the history of those keys

Sale 2:

https://backpack.tf/profiles/76561198002757046#!/compare/1636761600/1636848000

https://backpack.tf/profiles/76561199202090646#!/compare/1636761600/1636848000

Looks like a deposit from owner to bot

Sale 3:

https://backpack.tf/profiles/76561199202090646#!/compare/1637020800/1637107200

https://backpack.tf/profiles/76561198276770761#!/compare/1636848000/1637452800

Looks like some of the keys were used on something else in the first link, but looks like 65 since that is what it was listed for (https://gladiator.tf/listings/61942c93772bd030f4a890e3), and 65 keys left the buyers backpack

So we got sales at 56 and 65, so going with 56-65