Sale 1:

https://backpack.tf/profiles/76561198048492330#!/compare/1528329600/1528416000

https://backpack.tf/profiles/76561198046078624#!/compare/1528243200/1528416000

Sold for Hot Festivized Specialized Killstreak Cosmic Calamity Stickybomb Launcher (Battle Scarred)(43)

Sale 2:

https://backpack.tf/profiles/76561198046078624#!/compare/1530316800/1530576000

https://backpack.tf/profiles/76561198055622215#!/compare/1530316800/1530403200

Untrace.

Sale 3:

https://backpack.tf/profiles/76561198055622215#!/compare/1530576000/1530748800

https://backpack.tf/profiles/76561198388363768#!/compare/1530662400/1530748800

Sold for Strange KaW Cold Killer

Killer Mini:

https://backpack.tf/suggestion/5b5a454c44325a46fc5417ad

Suggestion for 29.5 keys

Sale 4:

https://backpack.tf/profiles/76561198388363768#!/compare/1530662400/1530748800

https://backpack.tf/profiles/76561198089253101#!/compare/1530662400/1530748800

Sold with 5 keys + negligible ref for Cool FT Bamboo Scattergun

Use there.

Sale 5:

https://backpack.tf/profiles/76561198089253101#!/compare/1530748800/1530835200

https://backpack.tf/profiles/76561198002757046#!/compare/1530748800/1530835200

Sold for 19 traceable keys, could be more? not using.

Lets go with a wide range of 30 - 43 keys