Thanks ツ JoXu ツ for the help

Sale 1:

18 keys (exluding as there are sellers at 14 and 15, and its a taunt and its an outlier anyway)

Holy Grail Oblooterated

https://backpack.tf/profiles/76561198126985704#!/compare/1519344000/1519430400

https://backpack.tf/item/5055841569

Oblooterated Mini:

$35 = 18 keys

https://marketplace.tf/items/1120;5;u3003

Sale 2:

(Bulky)

Sold with Aces Brass Bucket(9.5) for Aces Danger + 1 key

https://backpack.tf/profiles/76561198137218089#!/compare/1521676800/1521763200

https://backpack.tf/profiles/76561198087172601#!/compare/1521676800/1521763200

Sale 3:

13 pure

https://backpack.tf/profiles/76561198382654640#!/compare/1521244800/1521331200

https://backpack.tf/profiles/76561198137218089#!/compare/1520899200/1521331200

Sale 4:

9 pure (quicksell)

https://backpack.tf/profiles/76561198100894341#!/compare/1519084800/1519171200

https://backpack.tf/profiles/76561198382654640#!/compare/1519084800/1519171200

Sale 5:

15 keys

Baker Boy(14) + festivizer (~1 key)

https://backpack.tf/profiles/76561198139800274#!/compare/1520553600/1520726400

Baker Boy Mini:

$30 = 15 keys (excluding because of seller and sale at 14 and it is a marketplace.tf sale on a low-tier)

https://marketplace.tf/items/107;5;u35

14 pure

https://backpack.tf/profiles/76561198208327832#!/compare/1520726400/1520985600

Seller at 14: https://gyazo.com/1621630c20f8fa31cf4e66f0dba23d8b

Sale 6:

11 pure (quicksell) (http://www.tf2outpost.com/trade/29578463)

https://backpack.tf/profiles/76561198167705157#!/compare/1520294400/1520380800

Sale 7:

(bulky)

Sold with 10 pure for a Green Energy Pugilist's Protector

https://backpack.tf/profiles/76561198162949490#!/compare/1518480000/1518566400

https://backpack.tf/profiles/76561198060802427#!/compare/1518480000/1518566400

Final: 13-15