Sale 1:

Sold for Electric Hat Protector Universal Translator (14)

Seller: https://backpack.tf/profiles/76561198826254247#!/compare/1551398400/1551484800

Buyer: https://backpack.tf/profiles/76561198170813939#!/compare/1551398400/1551484800

https://backpack.tf/item/2640704829

X = 14

Sale 2:

Sold for 12 keys

Seller: https://backpack.tf/profiles/76561198348057478#!/compare/1551830400/1551916800

Buyer: https://backpack.tf/profiles/76561198033408799#!/compare/1551916800/1552089600

https://backpack.tf/item/2880009553

X = 12

Sale 3:

Sold for 9 keys + ~0.5 keys in metal

Seller: https://backpack.tf/profiles/76561198262288177#!/compare/1545436800/1545523200

Buyer: https://backpack.tf/profiles/76561198225796692#!/compare/1545436800/1545523200

https://backpack.tf/item/5149733885

X = 9.5

Other Sales:

https://backpack.tf/item/5149733885 (#1-3)

https://backpack.tf/item/2640704829 (#4-6)

#1

Sold with a key in items for Smoking Stout Shako

https://backpack.tf/profiles/76561198225715416#!/compare/1545350400/1545436800

https://backpack.tf/profiles/76561198140083209#!/compare/1545350400/1545436800

Can be used on the shako.

#2

Untraceable

https://backpack.tf/profiles/76561198140083209#!/compare/1545350400/1545436800

https://backpack.tf/profiles/76561198262288177#!/compare/1545350400/1545436800

#3

Bulk for Roboactive Swagman’s Swatter

https://backpack.tf/profiles/76561198301336678#!/compare/1551744000/1551830400

https://backpack.tf/profiles/76561198192740165#!/compare/1551657600/1551830400

#4

Sold for Poisonous Bubbles Soviet Strongarm + 1 key

https://backpack.tf/profiles/76561198170813939#!/compare/1551657600/1551744000

https://backpack.tf/profiles/76561198135752783#!/compare/1551225600/1551744000

Can be used on the Strongarm if it isn’t too high there.

#5

Untraceable

https://backpack.tf/profiles/76561198135752783#!/compare/1551225600/1551744000

https://backpack.tf/profiles/76561198159194104#!/compare/1551657600/1551744000

#6

Sold with ~6 keys in pure/items for Phantasm Buy a Life

https://backpack.tf/profiles/76561198159194104#!/compare/1551657600/1551744000

https://backpack.tf/profiles/76561198418740133#!/compare/1551657600/1551744000

Sellers:

https://i.imgur.com/LUUyLKq.png

https://backpack.tf/item/2640704829 - 13 keys

Sales at:

9.5

12

14

Buyers at 9.5, excluding 9.5.

Going with 12-14