Sale 1:

https://backpack.tf/profiles/76561198080355107#!/compare/1541116800/1541203200

https://backpack.tf/profiles/76561198135509343#!/compare/1539820800/1542326400

Low.

Sale 2:

https://backpack.tf/profiles/76561198125791160#!/compare/1545264000/1545350400

https://backpack.tf/profiles/76561198166855771#!/compare/1545264000/1545350400

Sold for 25 keys

Sale 3:

https://backpack.tf/profiles/76561197989484727#!/compare/1547078400/1547164800

https://backpack.tf/profiles/76561198125791160#!/compare/1547078400/1547164800

Bulk

Sale 4:

https://backpack.tf/profiles/76561198125791160#!/compare/1547769600/1547856000

https://backpack.tf/profiles/76561198126964914#!/compare/1547856000/1547942400

Sold for 22 keys

Sale 5:

https://backpack.tf/profiles/76561198021055079#!/compare/1544400000/1544486400

https://backpack.tf/profiles/76561198170165054#!/compare/1544313600/1544486400

Sold for Surge Noir

Use there.

Sale 6:

https://backpack.tf/profiles/76561198170165054#!/compare/1544659200/1544745600

https://backpack.tf/profiles/76561198084617235#!/compare/1544572800/1544745600

Sold for CTFL Reggae

Reggae Mini:

https://backpack.tf/suggestion/5c47f2ddcf6c75327749a09a

Suggestion for 22.5 keys

Sale 7:

https://backpack.tf/profiles/76561198084617235#!/compare/1544745600/1544832000

https://backpack.tf/profiles/76561198085880346#!/compare/1544745600/1544832000

Sold with spelled item + ~6 keys in sweets for Strange Steaming KE

Use there.

Sale 8:

https://backpack.tf/profiles/76561198085880346#!/compare/1546128000/1546214400

https://backpack.tf/profiles/76561197998934095#!/compare/1546041600/1546214400

Bulky

Sale 9:

https://marketplace.tf/items/250;5;u56

Buyer sale

Total sales @:

22, 22.5, 25 keys

Unsold for 20 days at 21,

Unsold for 22 for a month.

Gonna go with 21 - 22 keys, using 22 pure as the high end.