Let me show you how it's done, mate.

Green Energy Heavy Duty Rag

Sale 1

Bulk for Nebula Phono

https://backpack.tf/profiles/76561198054544075#!/compare/1538697600/1539129600

https://backpack.tf/profiles/76561198053747026#!/compare/1538697600/1538784000

Sale 2

Sold for 23 keys

https://backpack.tf/profiles/76561198053747026#!/compare/1539129600/1539302400

https://backpack.tf/profiles/76561198072767701#!/compare/1539302400/1539388800

Sale 3

Bulk for C. Moon Tavish DeGroot Experience (used there)

https://backpack.tf/profiles/76561198072767701#!/compare/1540598400/1540944000

https://backpack.tf/profiles/76561198168863803#!/compare/1540512000/1540598400

Sale 4

Sold for 25 keys

https://backpack.tf/profiles/76561198168863803#!/compare/1541030400/1541116800

https://backpack.tf/profiles/76561198199137138#!/compare/1540944000/1541116800

Sellers:

None

Buyers:

Human buyer @ 23, fresh

2 months @ 20

3x fresh @ 19

Sales: 23 / 25

With a fresh buyer at 23 (and it being human), I'll still include 23 keys for a final range of 23-25 keys.

Feel free to report more sales or leave some feedback down below!

Cheers and have a good one!