https://marketplace.tf/items/tf2/614;5;u10

Jan 17 - $89.99 / $2.11 = 42.65 keys https://backpack.tf/item/8063116785

https://backpack.tf/profiles/76561198132176657#!/compare/1605225600/1607644800

https://backpack.tf/profiles/76561198139370347#!/compare/1605139200/1605225600

Untraceable

https://backpack.tf/profiles/76561199085116273#!/compare/1605052800/1605139200

https://backpack.tf/profiles/76561198132699658#!/compare/1605052800/1605139200

36 item stack matches to near ID, which is 36 keys

https://backpack.tf/profiles/76561198132699658#!/compare/1605052800/1605139200

https://backpack.tf/profiles/76561198267189538#!/compare/1605052800/1605139200

Untraceable

https://backpack.tf/profiles/76561198032176942#!/compare/1608508800/1608681600

https://backpack.tf/profiles/76561198202452244#!/compare/1611446400/1612396800

The 1st compare looks convincing but histories don't match...

https://backpack.tf/profiles/76561198202452244#!/compare/1612051200/1612396800

https://backpack.tf/profiles/76561198142958707#!/compare/1612310400/1612396800

Untraceable/Bulk

https://backpack.tf/profiles/76561198072986766#!/compare/1609286400/1609459200

https://backpack.tf/profiles/76561198804605655#!/compare/1609372800/1609459200

Untraceable

https://backpack.tf/profiles/76561198804605655#!/compare/1610064000/1610150400

https://backpack.tf/profiles/76561198316071886#!/compare/1609977600/1610064000

Untraceable or Bulk

https://backpack.tf/profiles/76561198316071886#!/compare/1612051200/1612137600

https://backpack.tf/profiles/76561198301240927#!/compare/1611964800/1612310400

https://gladiator.tf/listings/60143c3d1fba3333c641d92f

49 keys, buyout was 50

https://backpack.tf/profiles/76561199004803157#!/compare/1608595200/1608681600

https://backpack.tf/profiles/76561198027059756#!/compare/1607126400/1608681600

Untraceable

https://backpack.tf/profiles/76561198027059756#!/compare/1608681600/1608768000

https://backpack.tf/profiles/76561198363628327#!/compare/1608681600/1608768000

Untraceable

https://backpack.tf/profiles/76561198363628327#!/compare/1609200000/1609286400

https://backpack.tf/profiles/76561198986747837#!/compare/1609113600/1609372800

Untraceable

https://backpack.tf/profiles/76561198986747837#!/compare/1609372800/1609459200

https://backpack.tf/profiles/76561198886850124#!/compare/1609372800/1609459200

Untraceable

https://backpack.tf/profiles/76561198886850124#!/compare/1609545600/1609632000

https://backpack.tf/profiles/76561198155386309#!/compare/1609459200/1609545600

Untraceable

https://backpack.tf/profiles/76561198155386309#!/compare/1609545600/1609632000

https://backpack.tf/profiles/76561199022820407#!/compare/1591660800/1609545600

Untraceable

https://backpack.tf/profiles/76561199022820407#!/compare/1591660800/1609545600

https://backpack.tf/profiles/76561198296900018#!/compare/1609459200/1609718400

Untraceable

https://backpack.tf/profiles/76561198296900018#!/compare/1611014400/1611187200

https://backpack.tf/profiles/76561199067635212#!/compare/1610668800/1611187200

Untraceable

https://backpack.tf/profiles/76561198396499936#!/compare/1604966400/1605052800

https://backpack.tf/profiles/76561198134624832#!/compare/1604966400/1605052800

161 item stack, which is:

Starstorm Insomnia Hot Dogger - later sold for 40+unpriced hat with 13 key buyers https://backpack.tf/profiles/76561198396499936#!/compare/1611964800/1612051200

6 keys

1 trillion sweets

this is a high outlier

https://backpack.tf/profiles/76561198134624832#!/compare/1605830400/1606608000

https://backpack.tf/profiles/76561198342161127#!/compare/1606521600/1606608000

Bulk for Scorching Hot Dogger

Sales

36

43

49

161 item stack which is minimum 59 keys

Sellers

https://gyazo.com/3e9e7abea8d5681466b257cb333021bb

young at 37

https://marketplace.tf/items/tf2/614;5;u10

$89.99, looks like has been trying since november https://backpack.tf/item/9440496594

which is about 43 keys

lets go with 36-43