I'm out of form.

The Spook's Apprentice

https://backpack.tf/item/2078603356

Sale 1) Sold for a Blizzardy Storm Das Hazmattenhatten + 9 Keys

https://backpack.tf/profiles/76561198069493147#!/compare/1506556800/1506729600

I can't find a decent Mini for the Hazmattenhatten.

Sale 2) Sold for a Duped Orbiting Fire Le Party Phantom (31 Keys) + 8 Keys

https://backpack.tf/profiles/76561198255903931#!/compare/1508803200/1508889600

31 + 8 = 39 Keys, which I'll round to 40 Keys

Phantom Mini

https://backpack.tf/profiles/76561198169285775#!/compare/1508716800/1508803200 - Sold + 3 Keys for a Vivid Plasma Noble Amassment (33 Keys)

33 - 3 = 30 Keys

Noble Micro

https://backpack.tf/suggestion/5a0ee434cf6c7554c6188534 - 34 Keys

Sale 3) Sold + ~4 Keys of Items for a Professional Killstreak Australium Grenade Launcher (~20 Keys) + Specialized Killstreak Australium Wrench (~19 Keys)

https://backpack.tf/profiles/76561198097865584#!/compare/1509148800/1509235200 - Seller's Backpack

https://backpack.tf/profiles/76561198151218984#!/compare/1508716800/1509235200 - Buyer's Backpack

20 + 19 = 39 - 4 = 35 Keys