It's time for me to breathe. I’m gasping for the air you stole from me. I'm crossing out the eyes and what they've seen. I'm better off, I'm better off, I'm better lost...

https://backpack.tf/item/6763104366

Sale 1) Sold + Professional Killstreak Australium Blutsauger (~7.5 Keys) for a Cloud 9 Towering Pillar of Hats (23.5 Keys)

https://backpack.tf/profiles/76561198277095373#!/compare/1524960000/1525046400

23.5 - 7.5 = 16 Keys

Pillar Mini

https://backpack.tf/profiles/76561198310144372#!/compare/1522195200/1522281600 - Sold for a Green Energy Tippler's Tricorne (~24 Keys)

https://backpack.tf/profiles/76561198060427332#!/compare/1528675200/1528761600 - Sold for 20 Keys

https://backpack.tf/profiles/76561198203170950#!/compare/1522540800/1522627200 - Sold for 24 Keys

https://backpack.tf/profiles/76561198277095373#!/compare/1529280000/1529366400 - Sold for a Duped Smoking Chieftain + 14 Keys + ~3 Keys of Items

http://www.tf2outpost.com/trade/29645728 - Capped by the Buyout of 27 Keys

https://backpack.tf/profiles/76561198804077112#!/compare/1522454400/1522627200 - Sold for an Atomic Translator + Silver Buy a Life (25 Keys total)

Sale 2) Sold for 17 Keys

https://backpack.tf/profiles/76561198163338252#!/compare/1527724800/1527897600

15 of the Keys were used to buy the Translator, as seen here: https://backpack.tf/profiles/76561198368615541#!/compare/1527811200/1527897600

Sale 3) Sold for 13 Keys + Orbiting Fire Bloke's Bucket Hat

https://backpack.tf/profiles/76561198036120032#!/compare/1528070400/1528156800

http://www.tf2outpost.com/trade/29672597 - Capped by the Buyout of 24 Keys

Sale 4) Sold for 17 Keys

https://backpack.tf/profiles/76561198322358308#!/compare/1528934400/1529193600

https://backpack.tf/item/6740110894

Sale 5) Sold for a Starstorm Insomnia Mo'Horn + Stormy Storm Bloke's Bucket Hat + FN Pro KS Strange Jazzy Sniper Rifle

https://backpack.tf/profiles/76561198120467518#!/compare/1524614400/1524700800

High outlier.

https://backpack.tf/item/6794454711

Sale 6) Sold for 25 Keys

https://backpack.tf/profiles/76561198042754411#!/compare/1526083200/1526601600

https://backpack.tf/profiles/76561198119597043#!/compare/1526342400/1526428800

The Minigun sold for the Keys

Sale 7) Sold for a Starstorm Slumber Human Cannonball (~30 Keys)

https://backpack.tf/profiles/76561198119597043#!/compare/1526774400/1526860800

High Outlier.

Cannonball Mini

https://backpack.tf/item/5260124628

Sale 1) Sold for a Neutron Star Kiss King + ~2 Keys of Refined/Items

https://backpack.tf/profiles/76561198122604075#!/compare/1525478400/1525564800

Sale 2) Sold for a Circling TF Logo Head Warmer

https://backpack.tf/profiles/76561198059884805#!/compare/1527033600/1527120000

https://backpack.tf/profiles/76561198120431673#!/compare/1527120000/1527984000 - This is where the Head Warmer appears. It was quicksold.

http://www.tf2outpost.com/trade/29662189 - Capped by the Buyout of 30 Keys

https://backpack.tf/item/5267772774

Sale 3) Sold + 7 Keys for a Starstorm Slumber Tipped Lid (37.5 Keys)

https://backpack.tf/profiles/76561198024867201#!/compare/1525392000/1525478400

37.5 - 7 = 30.5, which rounds to 31 Keys

https://backpack.tf/item/5205169637

Sale 4) Sold for a Starstorm Slumber Nasty Norsemann + Disco Beat Down Plumber's Pipe + 3 Keys

https://backpack.tf/profiles/76561198125791160#!/compare/1524096000/1524182400

https://backpack.tf/item/5192471891

Sale 5) Sold for a Cloud 9 Lucky Shot

https://backpack.tf/profiles/76561197960687824#!/compare/1524009600/1524355200

Sale 8) Sold for a Terror-Watt Das Maddendoktor (25 Keys)

https://backpack.tf/profiles/76561198411703111#!/compare/1527292800/1527379200

Maddendoktor Mini

https://backpack.tf/profiles/76561198143510251#!/compare/1526688000/1526774400 - Sold + 10 Keys + ~2 Keys of Items for a Scorching Flames Nano

http://www.tf2outpost.com/trade/29657681 - Capped by the Buyout of 27 Keys

https://backpack.tf/profiles/76561198054833725#!/compare/1527206400/1527292800 - Sold for 18 Keys

https://backpack.tf/profiles/76561198314620824#!/compare/1527206400/1527292800 - Quicksold for 22 Keys

https://backpack.tf/profiles/76561198411703111#!/compare/1527379200/1527465600 - Sold for a Memory Leak Handle + DP Head Hedge

https://backpack.tf/profiles/76561198040928107#!/compare/1527552000/1527638400 - Sold for an Insomnia Towering Titanium Pillar of Hats

https://marketplace.tf/items/30121;5;u57 - Sold for $45 when Keys were ~$1.96 (23 Keys) and $69.86 when Keys were ~$1.95 each (36 Keys, high)

https://imgur.com/a/nGNImmL - 19 Day Unsold at 24 Keys

Sale 9) Quicksold for ? Keys

https://backpack.tf/profiles/76561198317217557#!/compare/1527292800/1527379200

https://backpack.tf/profiles/76561198089253101#!/compare/1527292800/1527379200

Not using.

Sale 10) Sold for a Green Energy Antarctic Eyewear?

https://backpack.tf/profiles/76561198080379537#!/compare/1528416000/1528761600

Sale 11) Sold for 12 Keys

https://imgur.com/a/y0wilPT

Low outlier.

Sale 12) Sold for $44.99 when Keys were ~$1.94 each

https://marketplace.tf/items/30977;5;u18

44.99 / 1.94 = 23.19, which rounds to 23 Keys

Sales at: 12, 16, 17, 17, 23, 24, 25, 25, ~30, 40