Second try on first suggestion with help from a mod and AJ

Item 1

https://backpack.tf/item/7956854508

Sale 1

https://backpack.tf/profiles/76561198453530349#!/compare/1612915200/1613001600

https://backpack.tf/profiles/76561198304252584#!/compare/1612915200/1613001600

Screaming Tiger Taunt: The Proletariat Posedown matches

Untrace

Sale 2

https://backpack.tf/profiles/76561198304252584#!/compare/1613692800/1613779200

https://backpack.tf/profiles/76561198339336870#!/compare/1613779200/1613865600

Untrace

Sale 3

https://backpack.tf/profiles/76561198339336870#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561198271882486#!/compare/1614384000/1614556800

Sold for Circling Heart Lucky Shot?

Which then sold for 42 keys

https://backpack.tf/suggestion/60875c667b1aa115a86a5228 - I have a suggestion up for 40 keys

Taking as 40 keys

Sale 4

https://backpack.tf/profiles/76561198271882486#!/compare/1614556800/1614643200

https://backpack.tf/profiles/76561198337734785#!/compare/1614470400/1614556800

Untrace

Sale 5

https://backpack.tf/profiles/76561198337734785#!/compare/1615420800/1615507200

https://backpack.tf/profiles/76561198141754321#!/compare/1614902400/1615507200

Sold for 35 keys

https://gladiator.tf/listings/604be4085443d941f8790325 - yup

Sale 6

https://backpack.tf/profiles/76561198141754321#!/compare/1615507200/1615593600

https://backpack.tf/profiles/76561198129934145#!/compare/1613433600/1615852800

Added:

4 keys

for

CC Miami Nights Officer's Ushanka

Item 2

https://backpack.tf/item/4196560921

Sale 7

https://mannco.store/item/34236

Apr 11th - $58.24 / $1.88 = 30.98 keys

Sale 8

https://backpack.tf/profiles/76561198082864462#!/compare/1617926400/1618099200

https://backpack.tf/profiles/76561198828634617#!/compare/1617926400/1618099200

I suppose 43 keys do leave buyers inventory

However, I checked key histories:

https://backpack.tf/item/9975895911

https://backpack.tf/item/9967048850

https://backpack.tf/item/6490706470

These 3 do not match, so I am going to assume that this sale was 40 keys, buyers were just under that at the time:

https://gladiator.tf/listings/607359a622a998189c5f5277

Sale 9

https://backpack.tf/profiles/76561198828634617#!/compare/1618531200/1618704000

https://backpack.tf/profiles/76561198200126771#!/compare/1618617600/1618704000

Added 4 keys 21 ref

for

Strange Professional Killstreak Australium Flame Thrower - https://gladiator.tf/listings/607ac898ced757290565c915 - 46 as the time, plus your mini for 46 keys matches

46 - 4.4 = 41.6 keys, rounds back up to 42 keys, that's fine

Sale 10

https://backpack.tf/profiles/76561198200126771#!/compare/1618704000/1618790400

https://backpack.tf/profiles/76561198360428856#!/compare/1618704000/1618790400

11 keys match

Sale 11

https://backpack.tf/profiles/76561198360428856#!/compare/1618704000/1618790400

https://backpack.tf/profiles/76561198035664616#!/compare/1618704000/1618790400

Sold for 42 keys

Sale 12

https://backpack.tf/profiles/76561198035664616#!/compare/1619136000/1619222400

https://backpack.tf/profiles/76561199139201343#!/compare/1618963200/1619222400

Moved to bot

Sale 13

https://backpack.tf/profiles/76561199139201343#!/compare/1619740800/1619827200

https://backpack.tf/profiles/76561198172690987#!/compare/1619827200/1619913600

Untrace, likely withdrawn and dumped to buy order

Sale 14

https://backpack.tf/profiles/76561198172690987#!/compare/1619913600/1620000000

https://backpack.tf/profiles/76561198854384931#!/compare/1619827200/1619913600

Idk

Item 3

https://backpack.tf/item/2627234411

Sale 15

https://backpack.tf/profiles/76561198087242027#!/compare/1613347200/1613606400

https://backpack.tf/profiles/76561198021055079#!/compare/1613260800/1613347200

Sold for Green Energy Western Wear

Use there, this is the only recent clean sale

New sale at 44 keys: https://backpack.tf/profiles/76561198854384931#!/compare/1620345600/1620432000

40 - 44 should work taking into account aj's sale + this new sale

Sales:

40, 35, 31, 40, 42, 42, 44

Ordered:

31, 35, 40, 40, 42, 42, 44