Resuggesting

https://backpack.tf/suggestion/5ae07b8bcf6c7554ba7e4192#comment-5b0ffd05cf6c756644657be1

Excluding outdated sales used there

Sale #1

Sold for 9 keys, too close to buyers, considering as a quicksell

https://backpack.tf/profiles/76561198063455776#!/compare/1524441600/1524528000

Sale #2

Sold for ~12 keys pure

https://backpack.tf/profiles/76561198125082062#!/compare/1522195200/1522281600

12

Sale #3

Untracable on both sides

https://backpack.tf/profiles/76561198102769451#!/compare/1523923200/1524009600

https://backpack.tf/profiles/76561198305676157#!/compare/1523923200/1524009600

Sale #4

Sold for '72 killer solo

https://backpack.tf/profiles/76561198012242407#!/compare/1519171200/1519430400

10.25

Mini for '72 Killer solo

https://backpack.tf/suggestion/5b0e954444325a29b55048ec

Jarool I love your suggestions

Sale #5

Untracable

https://backpack.tf/profiles/76561198009549253#!/compare/1517184000/1518307200

Sale #6

Outdated, most likely scm

https://backpack.tf/profiles/76561197994917687#!/compare/1517616000/1518307200

Sale #6

Sold with reggaelator for isotope ww blizkrieg medi gun

https://backpack.tf/profiles/76561198105520850#!/compare/1523145600/1523750400

Should be used on medi gun

Mini for Reggaelator

Sold for 22 keys pure

https://backpack.tf/profiles/76561198058600622#!/compare/1523664000/1523923200

Sale #7

Sold for ~16 keys in items

https://backpack.tf/profiles/76561198313791426#!/compare/1517529600/1517788800

Sale #8

Marketplace.tf

https://marketplace.tf/items/30921;5;u3005

Sold for 37.9 usd. Keys was 1.97 atm, 37.9/1.97=19.2, rounding to 19

19

Sale #9

Sold within a day, untracable

https://backpack.tf/profiles/76561198055958749#!/compare/1524700800/1524787200

https://backpack.tf/profiles/76561198032176942#!/compare/1524700800/1524787200

Most likely sale to buy order, excluding

Sale #10

Sold for 9 keys

https://backpack.tf/profiles/76561198063455776#!/compare/1524441600/1524528000

Too close to buyers, excluding again

Sale #11

OPskins, excluding

https://backpack.tf/item/6631633128

Sale #12

Scm

https://backpack.tf/profiles/76561197995525480#!/compare/1525046400/1525478400

Sale #13, 14 and 15

bot.tf

using past 90 days

https://imgur.com/a/oSUF9uT

13 keys - https://backpack.tf/profiles/76561198305676157#!/compare/1524780000/1524866400

13 keys - https://backpack.tf/profiles/76561198305676157#!/compare/1524866400/1524952800

12 keys - https://backpack.tf/profiles/76561198305676157#!/compare/1525816800/1525903200

Sale #16

Mannco.trade sales there, excluding

https://backpack.tf/item/6483438103

Sale #17

Sold for Cool Factory New Alien Tech Scattergun

https://backpack.tf/profiles/76561198313791426#!/compare/1524873600/1524960000

No mini can be found for unu scattergun and that most likely would be high outlier because of the buyers on unu scatterguns

Sales we have: 12, 10.25, 16, 19, 13, 13, 12

Looks like it was consistently sold for 12-13 keys in pure but it could be sold for higher price as there are sales supporting this

I would call both 10.25 and 19 keys sales outliers and go with 12-16 range

Credits to lemons for pointing out that my 16 keys in items sale was actually 16 keys, not 15 keys as I've stated at the previous suggestion.

Cheers!