The Bone Zone

https://backpack.tf/item/2192527532

Sale 1) Sold for a Disco Beat Down Minnesota Slick + ~2 Keys of Items

https://backpack.tf/profiles/76561198002757046#!/compare/1559692800/1559779200

https://imgur.com/a/wP8fe3l - Capped by the Buyout of 25 Keys

Minnesota Slick Mini

https://backpack.tf/profiles/76561198066815050#!/compare/1561507200/1561593600 - Sold for a Bubbling Frag-Proof Fragger

https://backpack.tf/profiles/76561198140128839#!/compare/1561766400/1561852800 - Sold for a Head of Steam Sky High Fly Guy

https://backpack.tf/profiles/76561198080218537#!/compare/1561507200/1561852800 - Quicksold for 21 Keys + ~1 Key of Items

https://backpack.tf/profiles/76561198211416633#!/compare/1557705600/1557792000 - Sold for a Tesla Coil Hotrod + 1 Key

https://backpack.tf/profiles/76561198002757046#!/compare/1560556800/1560643200 - Sold for 24 Keys

Sale 2) Sold + 18 Keys for a Death at Dusk Bullet Buzz

https://backpack.tf/profiles/76561198054147366#!/compare/1560038400/1560124800

https://backpack.tf/profiles/76561198823739367#!/compare/1559952000/1560124800

Using this for the Bullet Buzz.

https://backpack.tf/item/2654647630

Sale 3) ?

https://backpack.tf/profiles/76561198166314775#!/compare/1560124800/1560211200

https://backpack.tf/profiles/76561198267189538#!/compare/1560124800/1560211200

Sale 4) Sold for a Steaming L'homme Burglerre + Steaming Toy Soldier + Steaming German Gonzila

https://backpack.tf/profiles/76561198267189538#!/compare/1561593600/1561680000

https://imgur.com/a/IFlbTbX - Capped by the Buyout of 25 Keys

Sale 5) Bulk sale for a Green Black Hole Outdoorsman

https://backpack.tf/profiles/76561198214513491#!/compare/1561680000/1561939200

https://backpack.tf/profiles/76561198086948995#!/compare/1561852800/1561939200

https://marketplace.tf/items/tf2/30162;5;u62 - Sold for $58 when Keys were ~$1.83 each

https://marketplace.tf/items/tf2/5021;6

58 / 1.83 = 31.69, which rounds to 32 Keys

High outlier.

https://imgur.com/a/AVMyuNZ - Young Seller at 29 Keys, 2 Month Seller at 29 Keys, and a 1 Month Seller at 30 Keys

https://backpack.tf/item/2320844590

https://backpack.tf/item/2192527532

https://backpack.tf/item/2654647630