Other sales:

https://backpack.tf/profiles/76561198145496150#!/compare/1586822400/1586908800 - Better for the Sniper

https://backpack.tf/profiles/76561198971964068#!/compare/1586908800/1586995200 - Bulk

Just using a seller's price isn't ideal when there are other sales for the hats included in the trade.

Sulphurous Cosa Sales:

https://marketplace.tf/items/tf2/459;5;u64 - $129.99 when Keys were $1.72 each (76 Keys)

What did you buy it for? That sale can also be used, but I can't tell from the compares.

Disco Beat Down Cosa Sales:

https://backpack.tf/profiles/76561198054270952#!/compare/1586044800/1586131200 - ?

https://backpack.tf/profiles/76561198817631515#!/compare/1582675200/1582848000 - Sold + DBD Blast for a Miami BoA

https://backpack.tf/profiles/76561198036609286#!/compare/1582329600/1582416000 - Quicksold for 25 Keys (was listed for 1 day)

https://backpack.tf/profiles/76561198302382325#!/compare/1585180800/1585267200 - Sold for 27 Keys

https://backpack.tf/profiles/76561198312568780#!/compare/1585180800/1585267200 - Bulk sale

https://backpack.tf/profiles/76561198312568780#!/compare/1585526400/1585612800 - Bulk sale

https://backpack.tf/profiles/76561198964982078#!/compare/1584057600/1584230400 - Looks like 17 Keys, but buyers were at 22 Keys. Not sure

https://imgur.com/a/xYGdjgj - Your purchase for the Sunbeams Cosa is capped by the Buyout of 120 Keys

You can resuggest this at 120 Keys