Got some more sales here:

https://backpack.tf/item/11096306739

https://backpack.tf/item/6571364443

Sale 1:

https://backpack.tf/profiles/76561198178638591#!/compare/1644969600/1645056000

https://backpack.tf/profiles/76561198285371555#!/compare/1644710400/1645056000

DBD Polar + Frost Virus + 40 keys for Scorching Head Price

better used on Head Price

Sale 2:

https://backpack.tf/profiles/76561198285371555#!/compare/1649721600/1649894400

https://backpack.tf/profiles/76561198056793885#!/compare/1649808000/1649894400

Bulk for Frost Viewfinder

Sale 3:

https://backpack.tf/profiles/76561198232041512#!/compare/1646524800/1646611200

https://backpack.tf/profiles/76561198078173908#!/compare/1646524800/1646611200

Frost Virus + Frost Swagger + CV Crown for Cloudy Yellow Belt

Best used on Crown since its the only sale in 3 years on it.

Sale 4:

https://backpack.tf/profiles/76561198078173908#!/compare/1646611200/1646697600

https://backpack.tf/profiles/76561197994697258#!/compare/1646611200/1646697600

Frost Swagger + Frost Virus + DBD HKC + SBTWC Attendand + KS kits? for CV Head Warmer

Better used for 2 year old Head Warmer price

For Completeness i'll add your Sale aswell:

https://backpack.tf/item/8761182056

https://backpack.tf/profiles/76561198068732040#!/compare/1651536000/1651708800

https://backpack.tf/profiles/76561198116607159#!/compare/1651536000/1651708800

~175 Keys

These are all Sales i could find, your Sale is actually the only usable one here so ~175 should be fine.