Sale 1-3:

https://marketplace.tf/items/30964;5;u17

$66.55 / $1.75 = 38.03 keys

$66.54 / $1.76 = 37.81 keys

$66.66 / $1.73 = 38.53 keys

Sale 4:

30 pure

https://backpack.tf/profiles/76561198010059325#!/compare/1546646400/1546732800

https://backpack.tf/profiles/76561198104168501#!/compare/1546646400/1546732800

Sale 5:

untrace

https://backpack.tf/profiles/76561198192602363#!/compare/1545955200/1546041600

https://backpack.tf/profiles/76561198143181554#!/compare/1545955200/1546041600

Sale 6:

Bulk for GE law

https://backpack.tf/profiles/76561198039731024#!/compare/1542153600/1542240000

https://backpack.tf/profiles/76561198061533354#!/compare/1542153600/1542240000

Sale 7:

Bulk for PE Tough Stuff Muffs

https://backpack.tf/profiles/76561198061533354#!/compare/1543190400/1543276800

https://backpack.tf/profiles/76561198342161127#!/compare/1543190400/1543276800

Sale 8:

untrace

https://backpack.tf/profiles/76561198125418050#!/compare/1541548800/1545436800

Sale 9:

untrace

https://backpack.tf/profiles/76561198022375650#!/compare/1545523200/1546473600

https://backpack.tf/profiles/76561198002757046#!/compare/1545436800/1545523200

Sale 10:

untrace

https://backpack.tf/profiles/76561198086291417#!/compare/1545696000/1545782400

https://backpack.tf/profiles/76561198002757046#!/compare/1545696000/1545782400

Sale 11:

untrace

https://backpack.tf/profiles/76561198118126742#!/compare/1540684800/1540857600

https://backpack.tf/profiles/76561198337734785#!/compare/1540771200/1540857600

Sale 12:

29 keys

https://backpack.tf/profiles/76561198337734785#!/compare/1540857600/1540944000

https://backpack.tf/profiles/76561198321221129#!/compare/1540857600/1541808000

Sale 13:

untrace

https://backpack.tf/profiles/76561198068234401#!/compare/1541635200/1542153600

Sale 14:

untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1541548800/1541635200

Sale 15:

untrace

https://backpack.tf/profiles/76561198337734785#!/compare/1543017600/1543104000

https://backpack.tf/profiles/76561198060705509#!/compare/1543017600/1543104000

=========================================

Sales: 29,30,38,38,39

Unsolds at 1+ weeks at 42 keys: https://imgur.com/a/EkhPR4k