Resuggesting given the info said in the previous suggestion! Credits to DoubleCheck for the original suggestion and those who commented the new sales and movements!

Item 1

https://backpack.tf/item/12360178454

Sale #1

Dumped for 105 keys + 20.33 refined (ID '13833838008" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198049447942#!/compare/1700611200/1700870400

Buyer: https://backpack.tf/profiles/76561199564942025#!/compare/1700784000/1700870400

Sale #2

Sold for 116 keys (keys in the bulk match)-

Seller: https://backpack.tf/profiles/76561199564942025#!/compare/1703635200/1703721600

Buyer: https://backpack.tf/profiles/76561198074261742#!/compare/1703721600/1704844800

Sale #3

Sold for 135 keys (ID "14161173510" of the unusual matches)-

Seller: https://backpack.tf/profiles/76561198074261742#!/compare/1707609600/1707696000

Buyer: https://backpack.tf/profiles/76561198105194407#!/compare/1707436800/1707696000

MP.TF Sale #1

Sold for $299.99 on February 26, 2024

Average Key Price @ $1.69ish

299.99/1.69 = 177.50ish keys

https://backpack.tf/item/13004135673

https://marketplace.tf/items/tf2/31294;5;u9

Sales @ 116, 135, 178

Rounding and taking 115-135 here :3