Only one of the hats was traded, other still in the hands of the unboxer

Sale #1 - Sold with smoking company man (indate, 18k) for orbiting planets rack (outdated) + 12 keys

https://backpack.tf/profiles/76561198136702159#!/compare/1516579200/1516665600

Rack minis –

#1 – 38 keys pure

https://backpack.tf/profiles/76561198106233311#!/compare/1517702400/1517788800

#2 – 34 keys pure

https://backpack.tf/profiles/76561198002757046#!/compare/1521158400/1521244800

Gonna take the average of 36 keys for calculations

Caribou = (12+36) – 18

=48-18

=30

Valued @ 30 keys

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Sale #2 – Sold with smoking company man (18k) for Ooze Defiant Spartan (indate 46k)

https://backpack.tf/profiles/76561198168997670#!/compare/1516320000/1516406400

Caribou = 46-18

= 28 keys

Valued @ 28 keys

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Sale #3 – 23 keys pure

https://backpack.tf/profiles/76561198080559842#!/compare/1516147200/1516233600

Valued @ 23 keys

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CONCLUSION:

Sold @ 23, 28, and 30

Final suggested range is 23-30 keys