Sale 1:

https://backpack.tf/profiles/76561198394616102#!/compare/1565395200/1567468800

https://backpack.tf/profiles/76561198326056285#!/compare/1566691200/1569888000

Untrace. maybe SCM?

Sale 2:

https://backpack.tf/profiles/76561198175645754#!/compare/1482019200/1566604800

https://backpack.tf/profiles/76561198143581382#!/compare/1566518400/1566604800

Untrace

Sale 3:

https://backpack.tf/profiles/76561198143581382#!/compare/1566691200/1566777600

https://backpack.tf/profiles/76561198174572993#!/compare/1566691200/1566777600

Sold for ~14 keys in sweets

Sale 4:

https://backpack.tf/profiles/76561198174572993#!/compare/1567555200/1567641600

https://backpack.tf/profiles/76561198257705464#!/compare/1567123200/1567641600\

Untrace

Sale 5:

https://backpack.tf/profiles/76561198045278633#!/compare/1565136000/1565222400

https://backpack.tf/profiles/76561197964171516#!/compare/1565136000/1565222400

Use there

Sale 6:

https://backpack.tf/item/6857123555

Most likely scammed then dumped.

Sale 7:

https://backpack.tf/profiles/76561198268798857#!/compare/1565913600/1566432000

https://backpack.tf/profiles/76561198337734785#!/compare/1566345600/1566432000

QS

Sale 8:

https://backpack.tf/profiles/76561198337734785#!/compare/1567296000/1567382400

https://backpack.tf/profiles/76561198067939860#!/compare/1567382400/1567468800

Sold for 13 keys

Sale 9:

https://backpack.tf/profiles/76561198355035421#!/compare/1566432000/1566604800

https://backpack.tf/profiles/76561198094230147#!/compare/1566518400/1566604800

Bulk

sale 10:

https://backpack.tf/profiles/76561198094230147#!/compare/1566864000/1567123200

https://backpack.tf/profiles/76561198309328337#!/compare/1567036800/1567123200

Sold for 11 keys

Sale 11:

https://backpack.tf/profiles/76561198309328337#!/compare/1567814400/1567987200

https://backpack.tf/profiles/76561198151378595#!/compare/1567728000/1567814400

Sold for ~11 keys

Sale 12:

https://backpack.tf/profiles/76561198151378595#!/compare/1567900800/1567987200

https://backpack.tf/profiles/76561198082095496#!/compare/1567728000/1567987200

sold for 9 keys

Sale 13:

https://backpack.tf/profiles/76561198082095496#!/compare/1569715200/1569801600

https://backpack.tf/profiles/76561198229786356#!/compare/1529884800/1569801600

Keys...

Sale 14:

https://backpack.tf/profiles/76561198229786356#!/compare/1569888000/1570406400

https://backpack.tf/profiles/76561198043826027#!/compare/1570320000/1570406400

Sold with ~2 keys in sweets for Searing Hetman

use there

Sale 15:

https://backpack.tf/profiles/76561198973894950#!/compare/1570147200/1570233600

https://backpack.tf/profiles/76561198130720294#!/compare/1570147200/1570233600

https://backpack.tf/profiles/76561198973894950#!/compare/1570147200/1570233600

https://backpack.tf/profiles/76561198432461884#!/compare/1570233600/1570320000

https://backpack.tf/profiles/76561198162683908#!/compare/1570233600/1570320000

https://backpack.tf/profiles/76561198865354802#!/compare/1570233600/1570320000

https://backpack.tf/profiles/76561198880237311#!/compare/1570147200/1570665600

Gambling

Sale 16:

https://marketplace.tf/items/tf2/382;5;u58

$23 / $1.82 = 12.64 keys

total sales @:

9, 11, 11, 12.64, 13, 14 keys

buyers up to 9 keys,

sellers for 16 keys,

taking 11 - 14 keys.