Sale 1:

https://backpack.tf/profiles/76561198398110150#!/compare/1567382400/1569110400

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

QS

Sale 2:

https://backpack.tf/profiles/76561198066815050#!/compare/1562457600/1562544000

https://backpack.tf/profiles/76561198158214692#!/compare/1562371200/1562630400

Sold for 20 keys

Sale 3:

https://backpack.tf/profiles/76561198061165369#!/compare/1497398400/1564099200

https://backpack.tf/profiles/76561198256078320#!/compare/1561334400/1567209600

Bulky / Untrace

Sale 4:

https://backpack.tf/profiles/76561198256078320#!/compare/1567209600/1567296000

https://backpack.tf/profiles/76561198043662502#!/compare/1567296000/1567468800

Untrace

sale 5:

https://backpack.tf/profiles/76561198018528305#!/compare/1568505600/1568592000

https://backpack.tf/profiles/76561198337734785#!/compare/1568505600/1568592000

QS

sale 6:

https://backpack.tf/item/7201574688

https://backpack.tf/profiles/76561198300727403#!/compare/1564099200/1564185600

SCM

Sale 7:

https://backpack.tf/profiles/76561198286257338#!/compare/1561507200/1561680000

https://backpack.tf/profiles/76561197977347045#!/compare/1561593600/1561680000

Sold for 19 keys

Sale 8:

https://backpack.tf/profiles/76561197977347045#!/compare/1562803200/1562976000

https://backpack.tf/profiles/76561198277409359#!/compare/1562889600/1562976000

Sold for 15 keys

Sale 9:

https://backpack.tf/profiles/76561198277409359#!/compare/1562889600/1562976000

https://backpack.tf/profiles/76561198091148250#!/compare/1562889600/1562976000

Sold for Planets Armored + ~5 keys in sweets

use there

Sale 10:

https://backpack.tf/profiles/76561198091148250#!/compare/1562976000/1563062400

https://backpack.tf/profiles/76561198895213010#!/compare/1562889600/1562976000

Untrace

Sale 11:

https://backpack.tf/profiles/76561198895213010#!/compare/1562976000/1563062400

https://backpack.tf/profiles/76561198194358278#!/compare/1562976000/1563062400

Sold for 18 keys

sale 12:

https://backpack.tf/profiles/76561198194358278#!/compare/1563148800/1563235200

https://backpack.tf/profiles/76561198305494036#!/compare/1563062400/1563148800

Untrace

sale 13:

https://marketplace.tf/items/tf2/384;5;u61

$30 / $1.82 = 16.48 keys

https://backpack.tf/item/7956991436

Total sales @:

15, 16.48, 18, 19, 20 keys

sellers recently and quickly dropped from ~16 keys, Killua dropping from 20...

https://bot.tf/stats/listings/M0DWZO2Q

https://bot.tf/stats/listings/Y5R05R92

https://bot.tf/stats/listings/4RGJELQ5

Taking 15 - 20 keys