Sale 1:

Sold for 13 keys

Seller: https://backpack.tf/profiles/76561198172471610#!/compare/1550102400/1550188800

Buyer: https://backpack.tf/profiles/76561198099685235#!/compare/1549670400/1550102400

https://backpack.tf/item/7268007195

X = 13

Sale 2: - Credit to Torb

Sold for 12 keys

Seller: https://backpack.tf/profiles/76561198160856661#!/compare/1549670400/1549756800

https://cdn.discordapp.com/attachments/452998746486079488/544252394146496532/unknown.png

https://backpack.tf/suggestion/5c5fb0d844325a2b8534024a - was posted here

https://backpack.tf/item/249583124

X = 12

Sale 3:

Sold for 11 keys + ~1 key in taunts

Seller: https://backpack.tf/profiles/76561198059724461#!/compare/1550534400/1550620800

Buyer: https://backpack.tf/profiles/76561198136177750#!/compare/1549324800/1550620800

https://backpack.tf/item/7268007195

X = 12

Sale 4:

Sold for 10 keys and less than half a key in cosmetic

Seller: https://backpack.tf/profiles/76561198425445035#!/compare/1550620800/1550707200

Buyer: https://backpack.tf/profiles/76561198093824611#!/compare/1550620800/1550707200

https://backpack.tf/item/7268007195

X = 10

Other Sales:

https://backpack.tf/item/249583124 (#1)

https://backpack.tf/item/7268007195 (#2-6)

#1

Bulk for PS Hottie’s Hoodie

https://backpack.tf/profiles/76561198043948052#!/compare/1548806400/1548892800

https://backpack.tf/profiles/76561198160856661#!/compare/1548806400/1548892800

#2

Untraceable

https://backpack.tf/profiles/76561198099685235#!/compare/1550102400/1550188800

https://backpack.tf/profiles/76561198846559158#!/compare/1549929600/1550188800

#3

Untraceable, only some keys match

https://backpack.tf/profiles/76561198846559158#!/compare/1550448000/1550534400

https://backpack.tf/profiles/76561198059724461#!/compare/1550361600/1550448000

#4

Untraceable, looks like it could've been around 10 or something

https://backpack.tf/profiles/76561198136177750#!/compare/1550620800/1550707200

https://backpack.tf/profiles/76561198425445035#!/compare/1550620800/1550707200

#5

Sold for Peace Sign Otolaryngologist’s Mirror + 1 key

https://backpack.tf/profiles/76561198316071886#!/compare/1547251200/1547337600

https://backpack.tf/profiles/76561198055518897#!/compare/1546387200/1547337600

Gonna be way too high without a B/O cap, excluding.

#6

Sold with ~3 keys in items/metal + 1 key for Omniscient Orb Vampire Vanquisher

https://backpack.tf/profiles/76561198055518897#!/compare/1546387200/1547337600

https://backpack.tf/profiles/76561198153511702#!/compare/1547251200/1547337600

Definitely shouldn’t be used here, excluding.

Sales at:

10

12 (2x)

13

Some of the sales at 12 may have quicksold, but they are far too common to be excluded, and the amount of times it got dumped on scrap supports this.

https://i.imgur.com/3z26mse.png - 10 is lower than quickbuyers. Excluding 10.

Going with 12-13.