2 pure sales in the past 3 months (per premium search)

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Sale 1:

https://backpack.tf/profiles/76561198151057926#!/compare/1536019200/1536364800

^

= 22 keys + 6 refined

≈ 22 keys

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Sale 2:

https://backpack.tf/profiles/76561198271385017#!/compare/1541721600/1541894400

^

= 23 keys

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Notes:

- Both sales have item IDs which are near each other

- Sale 2 is a duped unusual

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Advice, guidance and more evidence will be greatly appreciated!