Item 1:

https://backpack.tf/item/3591606922

Sale 1:

https://backpack.tf/profiles/76561198288294254#!/compare/1750550400/1750636800

https://backpack.tf/profiles/76561198254882979#!/compare/1750550400/1750636800

Sold for 400 keys pure (ID 15863135004)

Sale 2:

https://backpack.tf/profiles/76561198254882979#!/compare/1750291200/1750377600

https://backpack.tf/profiles/76561198140834992#!/compare/1750291200/1750377600

Sold with 30 keys for a Collector's Professional Killstreak Original (400) + A hot dogger (1.44 ref)

= 370

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Mini for Collector's Professional Killstreak Original:

https://backpack.tf/item/2826037899

https://backpack.tf/profiles/76561198801377836#!/compare/1749168000/1749254400

https://backpack.tf/profiles/76561198048176208#!/compare/1749168000/1749427200

Sold for 400 keys pure (ID 15811952629)

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Sale 3:

https://backpack.tf/profiles/76561198140834992#!/compare/1750032000/1750204800

https://backpack.tf/profiles/76561198328282971#!/compare/1750204800/1750291200

Sold for a Sunbeams Killer Exclusive?? I assume there is untrace keys involved so excluding this sale

//

Item 2:

https://backpack.tf/item/9183892097

Sale 4:

https://backpack.tf/profiles/76561198072441047#!/compare/1755043200/1755129600

https://backpack.tf/profiles/76561198240217520#!/compare/1755043200/1755129600

Untrace

Sale 5:

https://marketplace.tf/items/tf2/701;5;u13

Sold for $900 on the 11.07.2025

Keys were $2.02 on the 11th

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

900/2.02

= 445.5

Rounding up to 446

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Sales:

400, 370, 446

Going with 370 - 446 keys