Re-sugg with new sales

Item 1

https://backpack.tf/item/12942114567

Sale 1

https://gladiator.tf/time-machine?item=Vivid%20Plasma%20Blast%20Defense&at=2023-05-22T03:08:51.000Z

https://backpack.tf/profiles/76561198097427947#!/compare/1684713600/1684800000

https://backpack.tf/profiles/76561198082336619#!/compare/1651190400/1685664000

Blizzardy Storm Medic's Mountain Cap + 4 Strange Professional Killstreak Pain Train?

There's no valid sales for the Mountain Cap

Item 2

https://backpack.tf/item/11247373478

Sale 2

https://backpack.tf/profiles/76561198079404146#!/compare/1680480000/1683849600

https://backpack.tf/profiles/76561199110809353#!/compare/1680739200/1680825600

Not sure, keys don't match

Item 3

https://backpack.tf/item/6138553059

Covering this together at the end

Mp.tf

https://marketplace.tf/items/tf2/30863;5;u16

$75.00 / $2.05 = ~37 keys (May 1)

$50.00 / $2.00 = ~25 keys (May 23)

$75.00 / $2.00 = ~38 keys (May 24)

Other Sales From Mindacos

Sold for 33 Keys

https://backpack.tf/profiles/76561199084784906#!/compare/1686441600/1686528000

Buyer of that sale resold for 29 Keys

https://backpack.tf/profiles/76561198166762700#!/compare/1686700800/1686787200

Possibly sold for a Haunted Wick Headhunter's Brim?

https://backpack.tf/profiles/76561198809787765#!/compare/1687219200/1687392000

https://backpack.tf/profiles/76561198855892118#!/compare/1687132800/1687305600

Not fully sure here, would be better used on the brim regardless.

Total Sales

25, 29, 33, 37, 38

https://imgur.com/a/Hvuu0y0

Taking 25 - 38 keys as the suggested range from Mindacos' comment c: