Sale 1:

Sold for 25 keys

Seller: https://backpack.tf/profiles/76561198313704489#!/compare/1554422400/1554595200

Buyer: https://backpack.tf/profiles/76561198272011328#!/compare/1554595200/1554681600

https://backpack.tf/item/4591077548

X = 25

Sale 2:

Quicksold for 22 keys

Seller: https://backpack.tf/profiles/76561198331167728#!/compare/1554681600/1554768000

Buyer: https://backpack.tf/profiles/76561198178057793#!/compare/1554595200/1554768000

https://backpack.tf/item/4591077548

X = 22

Marketplace Sales:

https://marketplace.tf/items/30553;5;u29

https://manic.tf/keyprice/?at=2019-03-26 - $45 / $1.77 = 25.42 keys

X = 25

Other Sales:

https://backpack.tf/item/5960697661 (#1)

https://backpack.tf/item/4591077548 (#2-5)

#1

Untraceable

https://backpack.tf/profiles/76561198033661509#!/compare/1558224000/1558310400

https://backpack.tf/profiles/76561198327837250#!/compare/1558224000/1558310400

The rest in this history are gambling.

#2

Bulk for Beams Screamin’ Eagle

https://backpack.tf/profiles/76561198272011328#!/compare/1554681600/1554768000

https://backpack.tf/profiles/76561198331167728#!/compare/1554681600/1554768000

#3

Sold with items for Terror-Watt Deep Cover Operator

https://backpack.tf/profiles/76561198160120451#!/compare/1553558400/1553644800

https://backpack.tf/profiles/76561198213501437#!/compare/1553558400/1553644800

#4

Untraceable

https://backpack.tf/profiles/76561198213501437#!/compare/1553731200/1553817600

https://backpack.tf/profiles/76561198313704489#!/compare/1553299200/1553644800

#5

Untraceable

https://backpack.tf/profiles/76561198178057793#!/compare/1554595200/1554768000

https://backpack.tf/profiles/76561198119149660#!/compare/1554681600/1554768000

Sellers:

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

https://backpack.tf/item/5960697661 - 29 keys

https://backpack.tf/item/4591077548 - 30 keys

Sales at:

22

25 (2x)

22 quicksold, excluding 22.

Going with 25 flat.