Ayaya!

Sale 1: https://backpack.tf/profiles/76561198034202273#!/compare/1543190400/1543363200 - use there.

Sale 2: https://backpack.tf/profiles/76561198072908280#!/compare/1543536000/1543622400

Sold with 1 key in sweets for a Starstorm Insomnia Razor Cut (24 keys) + a Ominous Night Taunt: Bad Pipes (11 keys)

(24 + 11) - 1 = 34

Mini for Razor: https://backpack.tf/suggestion/5c3b4a1744325a3a2c01dac4 - 24

Mini for taunt: https://marketplace.tf/items/30671;5;u3022 - 19.44/1.76 = ~11

Sale 3: https://backpack.tf/profiles/76561198065477122#!/compare/1543881600/1543968000

Sold for a Haunted Ghosts Old Guadalajara (20 keys) + a Purple Confetti Conjurer's Cowl (20 keys)

20 + 20 = 40

Mini for Cowl: https://backpack.tf/suggestion/5c3b52e0cf6c752d7e3e7600 - 20

Sales: 34 and 40. 34-40.