Sale 1:

Sold for 25 keys

https://backpack.tf/profiles/76561198007696852#!/compare/1731456000/1731542400

https://backpack.tf/profiles/76561197967159739#!/compare/1731369600/1731542400

https://backpack.tf/item/15068984125

= 25 keys

Sale 2:

Sold with a cheap strange cosmetic for 21 keys

https://backpack.tf/profiles/76561198102530874#!/compare/1732579200/1733270400

https://backpack.tf/profiles/76561198094843256#!/compare/1732924800/1733184000

https://backpack.tf/item/15104507800

= 21 keys

Sale 3:

Sold for 10 keys

https://backpack.tf/profiles/76561198259528152#!/compare/1730505600/1730592000

https://backpack.tf/profiles/76561198091585647#!/compare/1730419200/1730505600

https://backpack.tf/item/15068984125

= 10 keys

Other Sales:

#1

https://backpack.tf/profiles/76561199103215683#!/compare/1730332800/1731801600

https://backpack.tf/profiles/76561198219027272#!/compare/1731801600/1731888000

https://backpack.tf/item/15088330778

Untraceable

#2

https://backpack.tf/profiles/76561198091585647#!/compare/1731283200/1731456000

https://backpack.tf/profiles/76561198007696852#!/compare/1731369600/1731456000

https://backpack.tf/item/15068984125

Bulk for Cloudy Moon Troublemaker’s Tossle Cap

#3

https://backpack.tf/profiles/76561198259528152#!/compare/1730505600/1730592000

https://backpack.tf/profiles/76561198139627699#!/compare/1730505600/1730678400

https://backpack.tf/item/15068984119

Bulk/untraceable

#4

https://backpack.tf/profiles/76561198160517725#!/compare/1730851200/1730937600

https://backpack.tf/profiles/76561198130707664#!/compare/1730851200/1731024000

https://backpack.tf/item/15067302101

Bulk/untraceable

#5

https://backpack.tf/profiles/76561198079990847#!/compare/1728518400/1728777600

https://backpack.tf/profiles/76561198043834548#!/compare/1728518400/1728604800

https://backpack.tf/item/13965267748

Untraceable

#6

https://backpack.tf/profiles/76561198177290723#!/compare/1732665600/1732924800

https://backpack.tf/profiles/76561198043996567#!/compare/1732752000/1732924800

https://backpack.tf/item/10886725549

Bulk for Blizzardy Storm Virtual Viewfinder

#7

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

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

https://backpack.tf/item/7972402487

Bulk or backpack buy

https://backpack.tf/item/15011912232 - transferred between alts/friends

Sellers:

https://i.imgur.com/uR54Ubu.png

https://backpack.tf/item/15068984119 - 70 keys

https://backpack.tf/item/7972402487 - marketplace

Sales at:

10

21

25

Buyer at 10, and 10 is currently looking like an outlier. Excluding 10.

Taking 21-25 keys.