https://marketplace.tf/items/tf2/30003;5;u62

Nov 29 - $52.49 / $1.76 = 29.82 keys

Dec 1 - $53.49 / $1.76 = 30.39 keys

Dec 12 - $75 / $1.89 = 39.68 keys

Dec 22 - $74.99 / $2.03 = 36.94 keys

https://backpack.tf/profiles/76561198067021386#!/compare/1602720000/1603152000

https://backpack.tf/profiles/76561198139370347#!/compare/1603065600/1603152000

Untraceable

https://backpack.tf/profiles/76561198139370347#!/compare/1606003200/1606089600

https://backpack.tf/profiles/76561198068301322#!/compare/1606694400/1606867200

This is a Marketplace sale, Dec 1

https://backpack.tf/profiles/76561198068301322#!/compare/1606953600/1607385600

https://backpack.tf/profiles/76561198021055079#!/compare/1607299200/1607385600

Added 13 for GE Condor Cap, better used there

https://backpack.tf/profiles/76561198337734785#!/compare/1601683200/1601769600

https://backpack.tf/profiles/76561198117024781#!/compare/1601078400/1603584000

30 keys

https://backpack.tf/profiles/76561198176593866#!/compare/1604188800/1604275200

https://backpack.tf/profiles/76561199099552373#!/compare/1604275200/1605312000

34 keys https://bot.tf/stats/listings/MXE0XE0D

https://backpack.tf/profiles/76561199099552373#!/compare/1604275200/1605312000

https://backpack.tf/profiles/76561198048297608#!/compare/1604016000/1604275200

Untraceable

https://backpack.tf/profiles/76561198048297608#!/compare/1604275200/1604361600

https://backpack.tf/profiles/76561198080179568#!/compare/1604275200/1604361600

Untraceable

https://backpack.tf/profiles/76561198080179568#!/compare/1606348800/1606435200

https://backpack.tf/profiles/76561198382622753#!/compare/1606348800/1606435200

81 item stack which is 31 keys and 50 refined

https://gyazo.com/43a5535f6963b56987001438486704e4

https://backpack.tf/profiles/76561198407374680#!/compare/1603411200/1604275200

https://backpack.tf/profiles/76561197963621595#!/compare/1604275200/1605052800

Untraceable

https://backpack.tf/profiles/76561198298749804#!/compare/1603065600/1603152000

https://backpack.tf/profiles/76561198850003649#!/compare/1603065600/1603152000

Untraceable

https://backpack.tf/profiles/76561198850003649#!/compare/1604102400/1604188800

https://backpack.tf/profiles/76561198281630040#!/compare/1604102400/1604188800

Untraceable

https://backpack.tf/profiles/76561198281630040#!/compare/1604188800/1604275200

https://backpack.tf/profiles/76561198191234989#!/compare/1604188800/1604275200

Untraceable

https://backpack.tf/profiles/76561198191234989#!/compare/1604275200/1604361600

https://backpack.tf/profiles/76561198130720294#!/compare/1604275200/1604361600

Untraceable

https://backpack.tf/profiles/76561198130720294#!/compare/1604361600/1604448000

https://backpack.tf/profiles/76561198820335875#!/compare/1604275200/1604361600

Untraceable

https://backpack.tf/profiles/76561198820335875#!/compare/1604448000/1604534400

https://backpack.tf/profiles/76561198094467579#!/compare/1604361600/1604448000

Untraceable

https://backpack.tf/profiles/76561198094467579#!/compare/1604448000/1604534400

https://backpack.tf/profiles/76561198176593866#!/compare/1604448000/1604534400

Untraceable

https://backpack.tf/profiles/76561198176593866#!/compare/1605916800/1606348800

https://backpack.tf/profiles/76561198046661438#!/compare/1606089600/1606176000

https://bot.tf/stats/listings/4J51QKZV

31 keys

https://backpack.tf/profiles/76561198176593866#!/compare/1608249600/1608336000

https://backpack.tf/profiles/76561198080179568#!/compare/1608249600/1608336000

Untraceable

https://backpack.tf/profiles/76561198080179568#!/compare/1608249600/1608336000

https://backpack.tf/profiles/76561198980853530#!/compare/1606262400/1608336000

This is the December 22 Marketplace sale

https://backpack.tf/profiles/76561198850121720#!/compare/1601251200/1601337600

https://backpack.tf/profiles/76561198084198192#!/compare/1600992000/1601337600

31 keys

https://backpack.tf/profiles/76561198084198192#!/compare/1601337600/1602288000

https://backpack.tf/profiles/76561198267189538#!/compare/1601251200/1601337600

Untraceable

https://backpack.tf/profiles/76561198425761681#!/compare/1605225600/1605484800

https://backpack.tf/profiles/76561198014404374#!/compare/1605398400/1605484800

Bulk

https://backpack.tf/profiles/76561198014404374#!/compare/1606608000/1606694400

https://backpack.tf/profiles/76561198152870586#!/compare/1606521600/1606694400

Searing Tundra Top (QSed same day) + white paint (1 key) + 2 keys

https://backpack.tf/profiles/76561198123441069#!/compare/1606780800/1606867200

https://backpack.tf/profiles/76561198152870586#!/compare/1606780800/1606867200

Added for Burning Towering Titanium Pillar, using there

Sales:

30

30

30

31

31

31 + 50

34

37

40

Sellers

https://gyazo.com/befe0e01c0f349940798ff58377c934e

32, new

36, 20 days

37, 4 months

going with 30-34