Sellers: 25, 26 (duped), 27 (listed 8 months ago).

https://ibb.co/kGLW25 <- screenshot

Sales:

https://backpack.tf/item/270069141

Scammer -> private bp -> QS (I suppose this is QS because new owner selling it for 25 right now, see the screenshot. Probably sold for Max's head)

Sale for 24 here: https://backpack.tf/profiles/76561198065201997#!/compare/1498780800/1498953600

B\O http://www.tf2outpost.com/trade/29229692

Histories not match but moderator assured that it's legit. ¯\_(ツ)_/¯

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Sold mine for 25 keys.

Added screenshot, because comparison show only 22 keys now.

https://backpack.tf/profiles/76561198093501381#!/compare/1500595200/1500681600

https://ibb.co/kDwVvQ

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https://backpack.tf/item/1137052966

Exchanger