Update. Found a micro on the Sunbeams Shellmet thanks to Torb.

1 recent usable sale:

https://backpack.tf/profiles/76561198056793885#!/compare/1584748800/1585180800

https://backpack.tf/profiles/76561198368868701#!/compare/1585094400/1585180800

Cotton and Billycock do not appear in compare links since there were quickly taken off marketplace. Here are the item histories:

https://backpack.tf/item/6274136804

https://backpack.tf/item/5998570393

Screenshot of trade: https://imgur.com/gallery/P0cRA78

Darkblaze Viewfinder (3415) + Harvest TC (1025)* = Poisoned Shadows Antlers (?) + Kill-a-Watt Law (32) + Haunted Ghosts Cotton Head(59.5)** + Haunted Ghosts Bootleg Base Metal Billycock (14) + Sunbeams Heralds Helm (67) + The Eldritch Opening Hephaistos' Handcraft (36)

This sale values the antlers at 4231.5 keys. Taking 4230.

Second unusable Sale

https://backpack.tf/profiles/76561198056793885#!/compare/1585526400/1585612800

I switched antlers with Artemis because he wanted the double spelled pair.

*Mini for Harvest TC

https://backpack.tf/suggestion/5e83f273ab321e11d91d7413

1025 keys

**Mini for Haunted Ghosts Cotton Head

https://marketplace.tf/items/tf2/30175;5;u8

Sold for $99.95 on the 26 of March. Keys were selling for $1.68 on average. 99.95/1.68 = 59.5 keys

All other sales are bulk/incredibly outdated.

***Mini for Haunted Ghosts Bootleg Base Metal Billycock

https://backpack.tf/classifieds?item=Bootleg+Base+Metal+Billycock&quality=5&tradable=1&craftable=1&particle=8&australium=-1&killstreak_tier=0

All sales are outdated/bulk. Taking lowest seller at 14 keys.

****Mini for Sunbeams Heralds Helm

1)https://backpack.tf/profiles/76561198353908023#!/compare/1584576000/1585094400

Bulk

2)https://backpack.tf/profiles/76561198312568780#!/compare/1585180800/1585267200

Bulk

3) https://backpack.tf/profiles/76561198096519024#!/compare/1585440000/1585526400

Sunbeams shellmet (56) + 11 keys. Taking 67 keys.

https://marketplace.tf/items/tf2/30897;5;u17 : Shellmet sold for $99.99 on the 18 of January. Keys were selling for $1.78 on average. 99.99/1.78 = 56.17. Taking 56 keys. (Credits to Torb)