Resuggestion, thanks to K1ng for the info!

Sale 1:

https://backpack.tf/profiles/76561198049088610#!/compare/1532736000/1532822400

https://backpack.tf/profiles/76561198060319763#!/compare/1532736000/1532822400

Sold for Searing Birdcage + 2.22 keys in sweets

Cage Mini:

https://backpack.tf/suggestion/5badbb6544325a5a5a67a377

Suggestion for 12.5 keys

Total is 14.72 keys

Sale 2:

https://backpack.tf/profiles/76561198049088610#!/compare/1532908800/1533168000

https://backpack.tf/profiles/76561198008793871#!/compare/1532822400/1532908800

SCM

Sale 3:

https://backpack.tf/profiles/76561198135388328#!/compare/1536969600/1537056000

https://backpack.tf/profiles/76561198109010131#!/compare/1528848000/1537833600

Sold for 11 keys(ID Match)

K1ng's Part:

Sale 3 is a scrap sale that went somewhat quickly (for scrap.tf sales, that is):

https://backpack.tf/item/2412995228

Unless there's some kind of extra evidence supporting it, I would rather exclude it. I also doubt it sold for 11 keys, without any extra ref added with them, as it usually happens. Part of the keys/ref were likely instantly traded for something else.

Taking 15 flat.