Sale 1:

Sold for 20 keys

https://backpack.tf/profiles/76561198970722371#!/compare/1728950400/1729123200

https://backpack.tf/profiles/76561198049661710#!/compare/1728950400/1729123200

https://backpack.tf/item/14869538058

= 20 keys

Sale 2:

Sold for 20 keys

https://backpack.tf/profiles/76561198970722371#!/compare/1729123200/1729468800

https://backpack.tf/profiles/76561198357524247#!/compare/1729123200/1729209600

https://backpack.tf/item/14814956174

= 20 keys

Sale 3:

Sold for 17 keys

https://backpack.tf/profiles/76561198080197552#!/compare/1731715200/1732406400

https://backpack.tf/profiles/76561197967159739#!/compare/1732233600/1732320000

https://backpack.tf/item/15044005989

= 17 keys

Sale 4:

Sold for 11 keys

https://backpack.tf/profiles/76561198268862482#!/compare/1729728000/1729814400

https://backpack.tf/profiles/76561198310972287#!/compare/1729728000/1729814400

https://backpack.tf/item/14952572024

= 11 keys

Other Sales:

#1

https://backpack.tf/profiles/76561198167433308#!/compare/1730937600/1731110400

https://backpack.tf/profiles/76561199010848227#!/compare/1730678400/1731110400

https://backpack.tf/item/15090159823

Untraceable

#2

https://backpack.tf/profiles/76561199010848227#!/compare/1730678400/1731110400

https://backpack.tf/profiles/76561199059160806#!/compare/1731024000/1731110400

https://backpack.tf/item/15090159823

Untraceable, some metal matches

#3

https://backpack.tf/profiles/76561198259528152#!/compare/1730160000/1730246400

https://backpack.tf/profiles/76561198139627699#!/compare/1730073600/1730246400

https://backpack.tf/item/15044005989

Bulk or something

#4

https://backpack.tf/profiles/76561198139627699#!/compare/1730332800/1730419200

https://backpack.tf/profiles/76561198080197552#!/compare/1730332800/1730505600

https://backpack.tf/item/15044005989

More bulk

#5

https://backpack.tf/profiles/76561198087099341#!/compare/1728604800/1728691200

https://backpack.tf/profiles/76561198273732193#!/compare/1728691200/1729123200

https://backpack.tf/item/13497709332

This is either missing stuff or the buyer paid wayyyy too much

#6

https://backpack.tf/profiles/76561198013596262#!/compare/1732147200/1732233600

https://backpack.tf/profiles/76561198063640894#!/compare/1732060800/1732147200

https://backpack.tf/item/14486387961

Bulk for Ooze Hound Dog

https://backpack.tf/item/14860964432 - gambled

Sellers:

https://i.imgur.com/PzlHWXm.png

https://backpack.tf/item/15090159823 - 21 keys

https://backpack.tf/item/14486387961 - marketplace, ~21 keys worth

Sales at:

11

17

20 (2x)

Buyer at 14, other buyers nearing 11. Excluding 11.

Taking 17-20 keys.