Sale 1:

https://backpack.tf/profiles/76561197964546925#!/compare/1571702400/1571788800

https://backpack.tf/profiles/76561198284481226#!/compare/1571356800/1572393600

SCM

sale 2:

https://backpack.tf/profiles/76561198284481226#!/compare/1572739200/1572825600

https://backpack.tf/profiles/76561198125791160#!/compare/1572739200/1572825600

Untrace

Sale 3:

https://backpack.tf/profiles/76561198932803997#!/compare/1567123200/1567209600

https://backpack.tf/profiles/76561198400462154#!/compare/1567123200/1567641600

Bulk

sale 4:

https://backpack.tf/profiles/76561198428680494#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561198065672832#!/compare/1545782400/1571184000

Untrace

sale 5:

https://backpack.tf/profiles/76561198065672832#!/compare/1571184000/1573603200

https://backpack.tf/profiles/76561198382290208#!/compare/1571443200/1571529600

QS

sale 6:

https://backpack.tf/profiles/76561198210225228#!/compare/1572739200/1572825600

https://backpack.tf/profiles/76561198094370379#!/compare/1572825600/1573084800

Sold for 11 keys

sale 7:

https://marketplace.tf/items/tf2/31042;5;u30

$69.69 / $1.84 = 37.88 keys

https://backpack.tf/item/7964907855

Sale 8:

https://backpack.tf/profiles/76561198040106025#!/compare/1570838400/1570924800

https://backpack.tf/profiles/76561198252999692#!/compare/1570838400/1570924800

Sold with 6 keys for CH Country

Country Mini:

https://backpack.tf/suggestion/5dcfc74ad3817224d5209113

Suggestion for 19 keys

Total is 13 keys

Sale 9:

https://backpack.tf/profiles/76561198252999692#!/compare/1573430400/1573516800

https://backpack.tf/profiles/76561198125791160#!/compare/1573430400/1573516800

QS

Sale 10:

https://backpack.tf/profiles/76561198125791160#!/compare/1573516800/1573689600

https://backpack.tf/profiles/76561198441399371#!/compare/1573603200/1573689600

Sold for 11 keys

Total sales @:

11, 11, 13, 37.88 keys

unsold for 11 keys

note that same seller has sold at 11 successfully for less time.

13 resold for less....

going with 11 flat.