Item 1:

https://backpack.tf/item/11989460816

Sale 1:

Sold for 16 Keys

https://backpack.tf/item/14600505238 (Keys ID: "14773236947")

https://backpack.tf/profiles/76561197964171516#!/compare/1723075200/1723248000

https://backpack.tf/profiles/76561198134162594#!/compare/1723161600/1723248000

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Item 2:

https://backpack.tf/item/11930593704

Sale 2:

Sold for 16 Keys

https://backpack.tf/profiles/76561197964171516#!/compare/1724371200/1724544000

//

Item 3:

https://backpack.tf/item/12949835691

Sale 3:

Sold for 18 Keys (Unusual ID: "14835188957")

https://backpack.tf/profiles/76561199564942025#!/compare/1724544000/1724630400

https://backpack.tf/profiles/76561198032016356#!/compare/1722902400/1724630400

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Item 4:

https://backpack.tf/item/12118672685

Sale 4:

Sold for 20 Keys

https://backpack.tf/item/13694536189 (Keys ID: "14725232611")

https://backpack.tf/profiles/76561199564942025#!/compare/1722124800/1722211200

https://backpack.tf/profiles/76561198115994407#!/compare/1722124800/1722470400

//

Item 5:

https://backpack.tf/item/12030757806

Sale 5:

Bulk

https://backpack.tf/profiles/76561199111168393#!/compare/1723161600/1727913600

https://backpack.tf/profiles/76561199696079615#!/compare/1727395200/1727913600

Sale 6:

Untraceable

https://backpack.tf/profiles/76561199696079615#!/compare/1727913600/1728086400

https://backpack.tf/profiles/76561198311498888#!/compare/1727827200/1727913600

Sale 7:

Untraceable

https://backpack.tf/profiles/76561198311498888#!/compare/1728691200/1728777600

https://backpack.tf/profiles/76561198283662274#!/compare/1728518400/1729123200

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Item 6:

https://backpack.tf/item/12010924148

Sale 8:

Sold for 16 Keys

https://backpack.tf/profiles/76561197964171516#!/compare/1723939200/1724112000

https://backpack.tf/profiles/76561198126724373#!/compare/1723852800/1724112000

Sale 9:

Untraceable

https://backpack.tf/profiles/76561198126724373#!/compare/1723852800/1724112000

https://backpack.tf/profiles/76561198026129220#!/compare/1724025600/1724112000

//

Marketplace.TF Sales:

https://marketplace.tf/items/tf2/31282;5;u229

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

Sale 10:

$40/$1.79 = ~22 Keys (Aug 10)

Sale 11:

$40/$1.87 = ~21 Keys (Sep 7)

Sale 12:

$40/$1.91 = ~21 Keys (Oct 12)

Sale 13:

$40/$1.91 = ~21 Keys (Oct 13)

//

Total Sales

16, 16, 16, 18, 20, 21, 21, 21, 22

https://imgur.com/xRcBFLt

Taking 16 - 22 Keys

Unsolds:

https://backpack.tf/item/11930593704 - $40