Sale 1:

https://backpack.tf/profiles/76561198048462415#!/compare/1534291200/1534636800

https://backpack.tf/profiles/76561198730177112#!/compare/1534550400/1534723200

Untrace.

Sale 2:

https://backpack.tf/profiles/76561198024867201#!/compare/1534723200/1534809600

Keys?

Sale 3:

https://backpack.tf/profiles/76561198295122993#!/compare/1531008000/1531094400

https://backpack.tf/profiles/76561198263586481#!/compare/1531094400/1531180800

Untrace. keys?

Sale 4:

https://backpack.tf/profiles/76561198263586481#!/compare/1531180800/1531267200

Untrace

Sale 5:

https://backpack.tf/profiles/76561198304343915#!/compare/1530144000/1530230400

https://backpack.tf/profiles/76561198165055074#!/compare/1530144000/1530230400

Sold for 72 Spent Well(4) + Whirlwind Burstchester(7.25) + ~8 keys in sweets

Total is 19.25 keys

Sale 6:

https://backpack.tf/profiles/76561198165055074#!/compare/1530921600/1531008000

https://backpack.tf/profiles/76561198360207407#!/compare/1530921600/1531008000

Sold for MS Fubar(6.75) + Strange Corona(26)

Total is 32.75 keys

Sale 7:

https://backpack.tf/profiles/76561198052218255#!/compare/1534723200/1534896000

https://backpack.tf/profiles/76561198312583107#!/compare/1534809600/1534896000

End up bulk?

Sale 8:

https://backpack.tf/profiles/76561197990037025#!/compare/1530230400/1530316800

Untrace.

Sale 9:

https://backpack.tf/profiles/76561198021272428#!/compare/1530835200/1530921600

https://backpack.tf/profiles/76561198024867201#!/compare/1530835200/1530921600

Sold for 13 keys

Sale 10:

https://backpack.tf/profiles/76561198024867201#!/compare/1531353600/1531440000

https://backpack.tf/profiles/76561198058742814#!/compare/1531440000/1531526400

Sold with a ~1 key in sweets for Abduction Translator(16) + Overclocked Cowl

No usable sales on the Cowl

https://backpack.tf/item/1648473573

https://i.imgur.com/8CZi17H.jpg

Sellers down to 13 keys

Let's go with 13 flat.