https://marketplace.tf/items/tf2/31117;5;u150

$149.99 / $2.14 = 70.09 keys

$159.99 / $2.14 = 74.76 keys

$129.99 / $2.10 = 61.90 keys

https://backpack.tf/item/9225196295

https://backpack.tf/item/9165484155

https://mannco.store/item/24155

https://backpack.tf/item/9256781033

$109.89 / $1.91 = 57.53 keys

https://backpack.tf/profiles/76561198040190735#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561198850121720#!/compare/1614470400/1614556800

Untraceable

https://backpack.tf/profiles/76561198850121720#!/compare/1614470400/1614556800

https://backpack.tf/profiles/76561198217101891#!/compare/1614470400/1614643200

Untraceable

https://backpack.tf/profiles/76561198217101891#!/compare/1614729600/1614902400

https://backpack.tf/profiles/76561198850274253#!/compare/1614643200/1614729600

It seems to be

Spec KS Aus Rocket - 44 keys https://gyazo.com/d02747147d537c8c07186a889c3919d2

+ ~6.5 keys, sale = 50.5 keys

https://backpack.tf/profiles/76561198850274253#!/compare/1616630400/1616716800

https://backpack.tf/profiles/76561198065927956#!/compare/1616630400/1616716800

Untraceable

https://backpack.tf/profiles/76561198065927956#!/compare/1617494400/1617580800

https://backpack.tf/profiles/76561199103740298#!/compare/1617408000/1617580800

https://gyazo.com/1eb77b90220edb2ac3d8c18ebb052e52

38 keys, gladiator buy

https://backpack.tf/profiles/76561199103740298#!/compare/1617926400/1618185600

https://backpack.tf/profiles/76561198130802680#!/compare/1617926400/1618012800

https://gyazo.com/1eb77b90220edb2ac3d8c18ebb052e52

51 keys, gladiator sale

https://backpack.tf/profiles/76561198068925028#!/compare/1611964800/1612396800

https://backpack.tf/profiles/76561198129205357#!/compare/1612310400/1612396800

Bulk

https://backpack.tf/profiles/76561198129205357#!/compare/1614988800/1615075200

https://backpack.tf/profiles/76561199006971039#!/compare/1614988800/1615075200

Bulk

https://backpack.tf/profiles/76561199006971039#!/compare/1615075200/1615161600

https://backpack.tf/profiles/76561198091502579#!/compare/1615075200/1615161600

Bulk

https://backpack.tf/profiles/76561198849646740#!/compare/1613001600/1614038400

https://backpack.tf/profiles/76561199100906514#!/compare/1613952000/1614038400

https://gyazo.com/ecb1bf71285cf1775c776bdc28c6a588

49 keys, 16.11 refined

https://backpack.tf/profiles/76561199100906514#!/compare/1614297600/1614384000

https://backpack.tf/profiles/76561198091502579#!/compare/1614297600/1614384000

https://gyazo.com/1e6828b5587c87d76432728b73c31ec7

55 keys

https://backpack.tf/profiles/76561198121630215#!/compare/1615334400/1616889600

https://backpack.tf/profiles/76561198064658655#!/compare/1616716800/1616803200

https://gyazo.com/256fde690ae7c472bc15703c100448f2

48 keys

https://backpack.tf/profiles/76561199100906514#!/compare/1618185600/1618272000

https://backpack.tf/profiles/76561198116002030#!/compare/1618099200/1618272000

https://gyazo.com/1eb77b90220edb2ac3d8c18ebb052e52

https://gyazo.com/9d7a5270da018ed73489052739ea1cd6

55 keys

https://backpack.tf/profiles/76561198002757046#!/compare/1613692800/1613779200

https://backpack.tf/profiles/76561198091502579#!/compare/1613606400/1613779200

Looks like several unusuals bought at once

Buyout was ~59 keys https://gladiator.tf/listings/6030428845f0bc17fdb9be25

https://backpack.tf/profiles/76561198280889477#!/compare/1614124800/1614124800

https://backpack.tf/profiles/76561198453530349#!/compare/1614038400/1614124800

Untraceable

https://backpack.tf/profiles/76561198453530349#!/compare/1616112000/1616198400

https://backpack.tf/profiles/76561198080179568#!/compare/1616112000/1616198400

Only a taunt matches near ID for some reason

https://backpack.tf/profiles/76561198090630856#!/compare/1613347200/1614729600

https://backpack.tf/profiles/76561198141054773#!/compare/1614384000/1614470400

Untraceable

https://backpack.tf/profiles/76561198141054773#!/compare/1617062400/1617148800

https://backpack.tf/profiles/76561198063393981#!/compare/1616976000/1617148800

55 keys

https://backpack.tf/profiles/76561198056366195#!/compare/1615075200/1615420800

https://backpack.tf/profiles/76561199102668951#!/compare/1614124800/1617667200

Untraceable

https://backpack.tf/profiles/76561199046561146#!/compare/1610668800/1615248000

https://backpack.tf/profiles/76561198850121720#!/compare/1610582400/1610668800

Untraceable

https://backpack.tf/profiles/76561198850121720#!/compare/1610755200/1610841600

https://backpack.tf/profiles/76561198138170333#!/compare/1610841600/1611014400

48 keys

https://backpack.tf/profiles/76561198138170333#!/compare/1611014400/1612051200

https://backpack.tf/profiles/76561198850178158#!/compare/1610928000/1611014400

Untraceable

https://backpack.tf/profiles/76561198850178158#!/compare/1611964800/1612051200

https://backpack.tf/profiles/76561198116526217#!/compare/1610755200/1613433600

Untraceable

Sales:

38

48

48

49

50.5

51

55

55

55

57

59?

62

70

75

Above 57 looks high, they're all marketplace

57 is also mannco.store

One of the 55s was listed for about a month before it sold

38 went to a buy order

Let's go with 48-55