Item 1:

https://backpack.tf/item/9379054948

Sale 1:

https://backpack.tf/profiles/76561199147939995#!/compare/1748217600/1748822400

https://backpack.tf/profiles/76561199183171982#!/compare/1748736000/1748822400

Whole Inventory sale

Sale 2:

https://marketplace.tf/items/tf2/1182;5;u3043

Sold for $9.99 on the 14th of Aug

Keys were $1.82 on the 14th

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

9.99/1.82

= 5.48

Rounding up to 5.5

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Item 2:

https://backpack.tf/item/9375056586

Sale 3:

https://backpack.tf/profiles/76561198164814063#!/compare/1751673600/1751760000

https://backpack.tf/profiles/76561198203811797#!/compare/1751673600/1751760000

Bulk for Steaming HazMat Headcase then moved to mannco

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Item 3:

https://backpack.tf/item/6264033449

Mannco

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Sellers:

BPTF - https://imgur.com/a/y98Vm2A - 3, all listed on MPTF as below

MPTF - https://marketplace.tf/items/tf2/1182;5;u3043 - 3 @ $9.99

STN - Not listed

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Taunt%3A%20Yeti%20Punch?filter=Spellbound+Aspect - https://imgur.com/a/hvglJy5 - $36.30AUD (~9.5 keys)

Sale(s):

5.5

Going with 5.5 keys flat