Item 1:

https://backpack.tf/item/2681465314

Sale 1: bulk

https://backpack.tf/profiles/76561198033657100#!/compare/1645142400/1645228800

https://backpack.tf/profiles/76561198001646956#!/compare/1645142400/1645228800

Sale 2: 120 keys

https://backpack.tf/profiles/76561198137564765#!/compare/1643932800/1644019200

https://backpack.tf/profiles/76561198033657100#!/compare/1643932800/1644019200

Sale 3: Pumpkin Moon Twisted Topper (135) + 7 keys = 142 - rounding to 140

https://backpack.tf/profiles/76561198137564765#!/compare/1643328000/1643414400

https://backpack.tf/profiles/76561198007876507#!/compare/1643328000/1643414400

Sale 4: bulk

https://backpack.tf/profiles/76561198007876507#!/compare/1641945600/1642118400

https://backpack.tf/profiles/76561198053070636#!/compare/1642032000/1642118400

Sale 5: Untrace / Gamble prob

https://backpack.tf/profiles/76561198053070636#!/compare/1641686400/1641945600

https://backpack.tf/profiles/76561199134820705#!/compare/1641772800/1641945600

Sale 6: Purple Confetti Le Party Phantom (85) + 60 keys = 145

https://backpack.tf/profiles/76561198259000762#!/compare/1641427200/1641513600

https://backpack.tf/profiles/76561199193412191#!/compare/1641513600/1641600000

Item 2:

https://backpack.tf/item/214209201

Sale 7: Untrace

https://backpack.tf/profiles/76561198259000762#!/compare/1645056000/1645142400

https://backpack.tf/profiles/76561198453530349#!/compare/1645056000/1645142400

Sale 8: Gamble

https://backpack.tf/profiles/76561198259000762#!/compare/1645142400/1645228800

https://backpack.tf/profiles/76561197962471855#!/compare/1645142400/1645228800

Sale 9: Gamble

https://backpack.tf/profiles/76561197962471855#!/compare/1645228800/1645315200

https://backpack.tf/profiles/76561198364925952#!/compare/1645315200/1645401600

Item 3:

https://backpack.tf/item/203614305

Sale 10: bulk

https://backpack.tf/profiles/76561198048724906#!/compare/1645315200/1645488000

https://backpack.tf/profiles/76561198106511423#!/compare/1645315200/1645488000

Sales @ 145, 140, 120

New stuff:

Credit to: https://backpack.tf/u/76561198107067824

More sales:

https://backpack.tf/profiles/76561198074378939#!/compare/1651017600/1651276800

https://backpack.tf/profiles/76561198106511423#!/compare/1651017600/1651276800

Keys? untrace.

https://backpack.tf/profiles/76561198188093413#!/compare/1649289600/1649376000

https://backpack.tf/profiles/76561198036241064#!/compare/1649203200/1649289600

Untrace

https://backpack.tf/profiles/76561198036241064#!/compare/1649289600/1649376000

https://backpack.tf/profiles/76561198252999692#!/compare/1649289600/1649376000

Sold with Vivid KE + 2 keys + Gardener for Beams Crone(315) + Gardener (Gardener's cancel each other out)

https://backpack.tf/profiles/76561198252999692#!/compare/1650499200/1650585600

https://backpack.tf/profiles/76561198140565712#!/compare/1650499200/1650585600

Sold for 145 keys

https://backpack.tf/profiles/76561198140565712#!/compare/1650758400/1650844800

https://backpack.tf/profiles/76561198182213262#!/compare/1650758400/1650844800

Sold for 145 keys

https://backpack.tf/profiles/76561198182213262#!/compare/1651363200/1651449600

https://backpack.tf/profiles/76561198105071091#!/compare/1651363200/1651449600

Sold for 155 keys

65 in compare

rest of keys used to buy three unusuals:

MG Complex: (all 58 match)

https://backpack.tf/profiles/76561198163609625#!/compare/1651363200/1651449600

C9 Fedora: (8 of 24 match)

https://backpack.tf/profiles/76561198850274253#!/compare/1651363200/1651449600

KaW Modest (all 24 match)

https://backpack.tf/profiles/76561198850274253#!/compare/1651363200/1651449600

https://backpack.tf/profiles/76561198048724906#!/compare/1649289600/1649376000

https://backpack.tf/profiles/76561198418740133#!/compare/1649116800/1649289600

Sold for 150 keys

https://marketplace.tf/items/tf2/337;5;u15

https://backpack.tf/item/211083233

Duped sale

$299 / $1.73 = 172.83 keys

Sales:

120, 140, 145, 145, 145, 150, 155, 173(duped)

Taking 145-155 as advised.