Using past 2 months

Sold for 15 pure

https://backpack.tf/profiles/76561198066586338#!/compare/1536105600/1536278400

bunch of untraceable sales within a day here

https://backpack.tf/item/1135129972

And a marketplace.tf sale here

https://marketplace.tf/items/108;5;u29

At 26.4, keyprice was 1.96

26.4/1.96=13.4, rounds to 13

also sale at 34.46, seems like common marketplace outlier on low tier hat

no match

https://backpack.tf/profiles/76561198337734785#!/compare/1534291200/1534377600

https://backpack.tf/profiles/76561198277154668#!/compare/1534291200/1534377600

the inventory of that guy hasn't updated at all and the item went to zol so i'm guessing that was a sale to buy order

https://backpack.tf/profiles/76561198119487465#!/compare/1532995200/1533600000

sold for 14 keys pure

https://backpack.tf/profiles/76561198349886701#!/compare/1532736000/1532822400

only 5 keys match here, it went to bot, so considering that was a sale to buy order

https://backpack.tf/profiles/76561198021529238#!/compare/1531267200/1531785600

another messed up inventory

https://backpack.tf/profiles/76561198076479853#!/compare/1532822400/1532908800

https://backpack.tf/profiles/76561198171048015#!/compare/1531699200/1533081600

or inventories. untraceable.

tradeit sale and oldish sale, not using

https://backpack.tf/item/753699754

6 keys matches

https://backpack.tf/profiles/76561198272879850#!/compare/1533427200/1533513600

not valid

sold for in-date 15 keys hat

https://backpack.tf/profiles/76561198103361840#!/compare/1532908800/1533168000

sales we have: 15, 13, 14, 15

going with 13-15