Sale 1:

https://backpack.tf/profiles/76561198798977870#!/compare/1569888000/1570147200

https://backpack.tf/profiles/76561198080179568#!/compare/1570060800/1570147200

qS

sale 2:

https://backpack.tf/profiles/76561198080179568#!/compare/1571529600/1571616000

https://backpack.tf/profiles/76561198140106248#!/compare/1571356800/1571616000

Sold for 10 keys

Sale 3:

https://backpack.tf/profiles/76561198140106248#!/compare/1571356800/1571616000

https://backpack.tf/profiles/76561198337734785#!/compare/1573171200/1573344000

QS

sale 4:

https://backpack.tf/profiles/76561198026726254#!/compare/1569110400/1570924800

https://backpack.tf/profiles/76561198319046468#!/compare/1570924800/1571011200

Untrace

sale 5:

https://backpack.tf/profiles/76561198319046468#!/compare/1571788800/1572220800

https://backpack.tf/profiles/76561198160691752#!/compare/1572048000/1572220800

Sold for ~8.5 keys

sale 6:

https://backpack.tf/profiles/76561198160691752#!/compare/1572220800/1572307200

https://backpack.tf/profiles/76561198160691752#!/compare/1572220800/1572307200

Sold for ~6.5 keys

sale 7:

https://backpack.tf/profiles/76561198062926833#!/compare/1571961600/1572307200

https://backpack.tf/profiles/76561198051046601#!/compare/1572220800/1572307200

Sold for ~7.5 keys

Sale 8:

https://backpack.tf/profiles/76561198051046601#!/compare/1572220800/1572307200

https://backpack.tf/profiles/76561198108015668#!/compare/1572307200/1572393600

Sold with 1 keys for DBD Cockswain

use there, would end up high here

Sale 9:

https://backpack.tf/profiles/76561198011913661#!/compare/1569196800/1569369600

https://backpack.tf/profiles/76561198156255538#!/compare/1569196800/1569283200

Sold with ~6.5 keys in sweets for CPS Napper

use there, no other usable sale.

Sale 10:

https://backpack.tf/profiles/76561198105223387#!/compare/1572998400/1573516800

https://backpack.tf/profiles/76561198337734785#!/compare/1573430400/1573516800

QS

sale 11:

https://marketplace.tf/items/tf2/184;5;u57

$27.99 / $1.82 = 15.38 keys

https://backpack.tf/item/7956860016

Total sales @:

6.5, 7.5, 8.5, 10, 15.38 keys

buyers up to 7.5 keys,

seller at 11 keys,

taking 8.5 - 10 keys.