Treasure Island

https://backpack.tf/item/5024906921

Sale 1) Sold for 36 Keys

https://backpack.tf/profiles/76561198074924284#!/compare/1518048000/1518134400

https://backpack.tf/item/3360960496

Sale 2) Sold for 46 Keys

https://backpack.tf/profiles/76561198316071886#!/compare/1515456000/1515542400

Sale 3) Sold for 34 Keys?

https://backpack.tf/profiles/76561198065409820#!/compare/1519689600/1519776000 - Buyer's Backpack

The Seller's Backpack hasn't updated, so the Keys seemingly vanish. Not including this sale because I don't know for certain if it was the Bandana for 34 Keys.

Sale 4) Bulk Sale for a Sunbeams Charmer's Chapeau

https://backpack.tf/profiles/76561198065409820#!/compare/1519862400/1519948800

Sale 5) Sold for a Duped Steaming Pyromancer's Mask

https://backpack.tf/profiles/76561198326093863#!/compare/1520726400/1520812800

I can't find a Mini for the Mask.