PumpkaBOO

https://backpack.tf/item/1203267221

Sale 1) Sold for a Green Energy Thirst Blood (46 Keys) + Morning Glory Pirate Bandana (41 Keys)

https://backpack.tf/profiles/76561198134512931#!/compare/1520553600/1520640000 - Buyer's Backpack

46 + 41 = 87 Keys

Bandana Mini

https://backpack.tf/suggestion/5ab97dd7cf6c7567603e0e58 - 41 Keys

Sale 2) Sold for a Tesla Human Cannonball (41 Keys) + BS Hot Cosmic Calamity Loose Cannon + Duped Bubbling Black Watch + ~8 Keys of Items + 2 Keys

https://backpack.tf/profiles/76561198039731024#!/compare/1521417600/1521504000

https://imgur.com/a/1ncPB - Credits to Zombie Jesus

I couldn't find a Mini for the Loose Cannon or the Black Watch, but I'd imagine the sale is around 90 - 100 Keys.

Cannonball Mini

https://backpack.tf/suggestion/5ab7d19e44325a2bac2c0b83 - 41 Keys