Item 1:

https://backpack.tf/item/7956911159

Sale 1:

Dumped alongside other unusuals

https://backpack.tf/profiles/76561197990073245#!/compare/1735862400/1735948800

https://backpack.tf/profiles/76561198311498888#!/compare/1735862400/1735948800

Sale 2:

Sold for 64 Keys

https://backpack.tf/item/15138804152 (Key ID: "15383074968")

https://backpack.tf/profiles/76561198311498888#!/compare/1737504000/1737590400

https://backpack.tf/profiles/76561198820875715#!/compare/1737590400/1737676800

Sale 3:

Untraceable

https://backpack.tf/profiles/76561198820875715#!/compare/1737590400/1737676800

https://backpack.tf/profiles/76561198062747535#!/compare/1737504000/1737849600

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Item 2:

https://backpack.tf/item/4988807614

Sale 4:

Sold for 70 Keys (Unusual ID: "15404638546")

https://backpack.tf/profiles/76561198380634252#!/compare/1738108800/1738195200

https://backpack.tf/profiles/76561198417950846#!/compare/1738195200/1738800000

Sale 5:

Untraceable

https://backpack.tf/profiles/76561198417950846#!/compare/1740096000/1740700800

https://backpack.tf/profiles/76561198992538857#!/compare/1739836800/1740182400

Sale 6:

1:1 for Cloud 9 Reggaelator — Better used there

https://backpack.tf/profiles/76561198992538857#!/compare/1740355200/1740528000

https://backpack.tf/profiles/76561199746241974#!/compare/1740441600/1740614400

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Item 3:

https://backpack.tf/item/3056997702

Sale 7:

Bulk

https://backpack.tf/profiles/76561198055313748#!/compare/1739664000/1741996800

https://backpack.tf/profiles/76561198075991823#!/compare/1741824000/1742774400

Sale 8:

Sold for 55 Keys (Unusual ID: "15599591480")

https://backpack.tf/profiles/76561198075991823#!/compare/1742774400/1743638400

https://backpack.tf/profiles/76561199242236197#!/compare/1743465600/1743552000

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Marketplace.TF Sales:

https://marketplace.tf/items/tf2/30029;5;u14

https://marketplace.tf/items/tf2/5021;6

Sale 9:

$139.99/$1.84 = ~76 Keys (Mar 6)

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Total Sales

55, 64, 70, 76

https://imgur.com/97K2TJz

Excluding 76 due to seller @ 75 for almost 1 month and 55 as low due to 3 higher sales + STN buys for ~52.5 Keys (https://imgur.com/hfNLvF3)

Taking 64 — 70 Keys

Unsolds:

https://backpack.tf/item/4988807614 — 75

https://backpack.tf/item/3056997702 — $139.99