https://marketplace.tf/items/tf2/31186;5;u177

Sep 6 - $69.99 / $1.81 = 38.67 keys

Sep 12 - $69.99 / $1.84 = 38.04 keys

https://backpack.tf/item/10356494944

https://backpack.tf/profiles/76561198065241300#!/compare/1635465600/1635724800

https://backpack.tf/profiles/76561197982127154#!/compare/1635379200/1635465600

Bulk

https://backpack.tf/profiles/76561197982127154#!/compare/1636761600/1636848000

https://backpack.tf/profiles/76561198993631639#!/compare/1636848000/1636934400

Added Spellbound Didgeridrongo for Australium Wrench

https://backpack.tf/profiles/76561198045883624#!/compare/1630800000/1630886400

https://backpack.tf/profiles/76561198061128112#!/compare/1630800000/1632700800

Untraceable

https://backpack.tf/profiles/76561198263836417#!/compare/1634169600/1634256000

https://backpack.tf/profiles/76561198074925664#!/compare/1633564800/1634601600

Untraceable, buyout of 27 keys https://gladiator.tf/listings/6167d0f7b45180f8b0358d82

https://backpack.tf/profiles/76561198956272094#!/compare/1630454400/1630540800

https://backpack.tf/profiles/76561199125443371#!/compare/1630454400/1630540800

44 item stack, which is ~28 keys

https://backpack.tf/profiles/76561199125443371#!/compare/1630627200/1630713600

https://backpack.tf/profiles/76561198041437691#!/compare/1630627200/1630713600

Untraceable, buyout of 34 keys https://gladiator.tf/listings/61333859d34eef437a83a8eb

https://backpack.tf/profiles/76561198041437691#!/compare/1632960000/1633219200

https://backpack.tf/profiles/76561198117728433#!/compare/1633305600/1633478400

Went through an auction, its the keys leaving the 2nd compare, totaling to 24

https://backpack.tf/profiles/76561198028115480#!/compare/1635379200/1635465600

https://backpack.tf/profiles/76561198301294363#!/compare/1635292800/1635379200

Stormy Storm Toy Soldier, better used there

https://backpack.tf/profiles/76561198301294363#!/compare/1637280000/1637366400

https://backpack.tf/profiles/76561198394257711#!/compare/1637280000/1637366400

Smoking Milkman and 14 keys

https://backpack.tf/profiles/76561198263836417#!/compare/1634083200/1634169600

https://backpack.tf/profiles/76561198138707400#!/compare/1634083200/1634169600

27 keys, histories on keys match

https://backpack.tf/profiles/76561198263836417#!/compare/1632268800/1632355200

https://backpack.tf/profiles/76561198064658655#!/compare/1632268800/1632355200

bulk but apparently i wrote it down as 27 keys

27 keys was also the buyout https://gladiator.tf/listings/614c6bb9ecfe695957859cc7

https://backpack.tf/profiles/76561199100906514#!/compare/1637020800/1637107200

https://backpack.tf/profiles/76561198130164115#!/compare/1637020800/1637107200

30 keys, near ID match

https://backpack.tf/profiles/76561198320968282#!/compare/1632614400/1633219200

https://backpack.tf/profiles/76561199102430997#!/compare/1633132800/1633219200

Untraceable, likely sold to buy order

https://backpack.tf/profiles/76561199102430997#!/compare/1633305600/1633392000

https://backpack.tf/profiles/76561198091502579#!/compare/1633305600/1633392000

2 keys matches, buyout was ~32 keys https://gladiator.tf/listings/615b14d9bdafaabb0257e91a

Sales:

24

27

27

28

30

32

34?

38

39

38 and 39 are from early september on marketplace and are way too old now to be considered

current $70 seller/~38-39 on marketplace is also 2 months old and mine spent also a long time unsold on MP before it sold for 30

34 unknown and it might've sold to buy order price in an auction later

Going with 28-32