Sale 1:

https://backpack.tf/profiles/76561198342619180#!/compare/1535500800/1537401600

https://backpack.tf/profiles/76561198245054210#!/compare/1535155200/1535760000

Sold for 18 keys

Sale 2:

https://backpack.tf/profiles/76561198245054210#!/compare/1536969600/1537315200

https://backpack.tf/profiles/76561198079821428#!/compare/1536883200/1536969600

Can only trace a GL

Sale 3:

https://backpack.tf/profiles/76561198135388328#!/compare/1537228800/1537315200

https://backpack.tf/profiles/76561198231709968#!/compare/1537228800/1537315200

Sold for 12 keys + negligible ref

Sale 4:

https://backpack.tf/profiles/76561198328419180#!/compare/1537747200/1537833600

https://backpack.tf/profiles/76561198061275415#!/compare/1537660800/1537747200

Bulk.

Sale 5:

https://backpack.tf/profiles/76561198146640595#!/compare/1535155200/1535241600

https://backpack.tf/profiles/76561198068180717#!/compare/1528070400/1535241600

Sold for 13 keys

Sale 6:

https://backpack.tf/profiles/76561198111096526#!/compare/1533772800/1533945600

https://backpack.tf/profiles/76561198349207524#!/compare/1533859200/1533945600

Sold for Planets Dogger

Dogger Mini:

https://backpack.tf/suggestion/5bae6972cf6c754d147b7add

Suggestion for 13.5 keys

Sale 7:

https://backpack.tf/profiles/76561198349207524#!/compare/1534118400/1534204800

https://backpack.tf/profiles/76561198069493147#!/compare/1534032000/1534118400

Sold for Searing Sack

Use there.

Sale 8:

https://backpack.tf/profiles/76561198069493147#!/compare/1534636800/1534723200

https://backpack.tf/profiles/76561198337734785#!/compare/1534636800/1534723200

Untrace / QS

Sale 9:

https://backpack.tf/profiles/76561198337734785#!/compare/1534723200/1534809600

https://backpack.tf/profiles/76561198098002525#!/compare/1534809600/1534896000

Untrace.

Total sales @:

12, 13, 13.5, 18 keys

Calling 18 the outlier Based on 2 lower sellers

https://i.imgur.com/iBeECLd.jpg

12 based on buyers,

Taking 13 - 14 keys.