Resuggestion, thanks to Blaze for the info!

Sale 1:

https://backpack.tf/profiles/76561198363395191#!/compare/1567468800/1567555200

https://backpack.tf/profiles/76561198179254611#!/compare/1567468800/1567555200

Untrace

Sale 2:

https://backpack.tf/profiles/76561198171909991#!/compare/1560384000/1560470400

https://backpack.tf/profiles/76561198068351675#!/compare/1560297600/1560470400

Bulky / use there

Sale 3:

https://backpack.tf/profiles/76561198068351675#!/compare/1560297600/1560470400

https://backpack.tf/profiles/76561198337734785#!/compare/1560384000/1560470400

Sold for 7 keys

Sale 4:

https://backpack.tf/profiles/76561198337734785#!/compare/1562198400/1562284800

https://backpack.tf/profiles/76561198157969757#!/compare/1562112000/1562284800

Sold for keys...

Sale 5:

https://backpack.tf/profiles/76561198157969757#!/compare/1562284800/1562371200

https://backpack.tf/profiles/76561198006544512#!/compare/1562198400/1562284800

QS

Sale 5:

https://backpack.tf/profiles/76561198006544512#!/compare/1564185600/1564272000

https://backpack.tf/profiles/76561198303467148#!/compare/1564185600/1564272000

Sold for 8 keys

Sale 6:

https://backpack.tf/profiles/76561198303467148#!/compare/1564272000/1565308800

https://backpack.tf/profiles/76561198323565601#!/compare/1564185600/1564272000

QS

Sale 7:

https://backpack.tf/profiles/76561198337734785#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198106833267#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198131081286#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198337734785#!/compare/1562889600/1562976000

Untrace

Sale 8:

https://backpack.tf/profiles/76561198337734785#!/compare/1564790400/1564876800

https://backpack.tf/profiles/76561198101298759#!/compare/1564704000/1564876800

Untrace..

Sale 9:

https://marketplace.tf/items/tf2/481;5;u33

$15.99 / $1.82 = 8.79 keys <-- https://backpack.tf/item/1497657112 |

Total sales @:

7, 8, 8.79 keys

Blaze's Part:

Sale 3 was likely via buy order, sold in like an hour anyways. 8-9 should be okay I suppose.