Sale 1 -

http://backpack.tf/profiles/76561198259518713#!/compare/1459641600/1459728000

Sold with a haunted ghosts pom pom (27) for a Peace Sign Bomber (95)

95 - 27 = ~70

Sale 2 -

http://backpack.tf/profiles/76561198188019962#!/compare/1459209600/1459468800

Sold for a Stare From Beyond Human Cannonball (90)

Sale 3 -

http://backpack.tf/profiles/76561198034745792#!/compare/1467504000/1467590400

Sold for a Secret Nano + 10 keys

63 + 10 = 73 rounding to 75

Mini for the Nano -

http://backpack.tf/profiles/76561198081815204#!/compare/1467504000/1467590400

Sold for a Specialized Killstreak Australium Sniper Rifle (41) + Specialized Killstreak Australium Minigun (21) + 1 key

41 + 21 = 62 + 1 = 63