As to why this website doesn't think this hat exists is beyond me.

Sale 1

https://backpack.tf/profiles/76561198000247762#!/compare/1663027200/1663113600

https://backpack.tf/profiles/76561198040280241#!/compare/1663027200/1663113600

Pumpkin Moon Prehistoric Pullover for Sunbeams Skullcap (explanation below)

These sales occured literally minutes after each other and the pullover was not recorded in one of the inventories. And neither was the skullcap in one because it was being brokered at the time but had been returned to its owner just in time for the sale. Then my brown bombers were passed to that person who sold the skullcap for the pullover and then the pullover for my bombers. Above is the swap of the pullover for the skullcap, below is the bombers for the pullover. The skullcap has not sold recently other than this transaction so it would not be possible to price unless this hat can be.

Sale 2:

https://backpack.tf/profiles/76561198040280241#!/compare/1663027200/1663113600

https://backpack.tf/profiles/76561198114764948#!/compare/1661990400/1663113600

Demonflame Brown Bomber (1350) + Roboactive Brown Bomber (515) = 1865

Extra evidence: https://drive.google.com/file/d/1-BrqumYPhcUHtKV9hb668eGWFI2VZfI7/view?usp=sharing

Neither bomber has been priced yet but there are currently 2 active suggestions which can be found here:

https://backpack.tf/suggestion/6336fd66fa00822417078b39

https://backpack.tf/suggestion/633dc637597963f02b04f10c

Only 1 useful sale valued at 1865 keys.