Item 1: https://backpack.tf/item/4231382045

Sale 1:

https://backpack.tf/profiles/76561198088063575#!/compare/1783123200/1783296000

https://backpack.tf/profiles/76561198410760897#!/compare/1783123200/1783296000 - Buyers side shows all keys

Sold for 490 keys pure (ID 17225224813)

Item 2: https://backpack.tf/item/3978532362

Sale 2:

https://backpack.tf/profiles/76561198286843949#!/compare/1776643200/1776729600

https://backpack.tf/profiles/76561198199284954#!/compare/1776729600/1777075200

Seller was chatterbox but no idea on sale as it isn't clear

Item 3: https://backpack.tf/item/2388071623 - Moved to mannco

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Sellers:

BPTF - https://imgur.com/a/cZixmE7 - 1 @ 600

MPTF - https://marketplace.tf/items/tf2/590;5;u62 - None

STN - https://stntrading.eu/item/tf2/Unusual+Disco+Beat+Down+Brainiac+Hairpiece - None

SCM - https://steamcommunity.com/market/listings/440/Unusual%20Brainiac%20Hairpiece - None

Sale(s):

490

Going with 490 keys flat