Sale #1:

https://backpack.tf/profiles/76561198329626897#!/compare/1553904000/1553990400

Sold for 26 keys.

26 keys

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Sale #2:

https://backpack.tf/profiles/76561198110834357#!/compare/1552694400/1553990400

Bulk.

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Sale #3:

https://backpack.tf/profiles/76561198081042493#!/compare/1547078400/1547164800

SCM Sale?

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Sale #4:

https://backpack.tf/profiles/76561198124058619#!/compare/1546992000/1547251200

Untraceable.

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Sale #5:

https://backpack.tf/profiles/76561198246680606#!/compare/1550102400/1550188800

Untraceable.

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Sale #6:

https://bot.tf/stats/item?def=31025&q=5&ef=Disco+Beat+Down&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198335791307#!/compare/1549753200/1549839600

Bought for 25 keys.

25 keys

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Sale #7:

https://bot.tf/stats/item?def=31025&q=5&ef=Disco+Beat+Down&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198335791307#!/compare/1550790000/1550876400

Sold for 33 keys.

33 keys

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Sale #8:

https://backpack.tf/profiles/76561198148882724#!/compare/1553990400/1554076800

Sold for a Strange Professional Killstreak Australium Scattergun (41 keys) and a Strange Crone's Dome (1.3 keys)

42 keys

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Sale #9:

https://bot.tf/stats/item?def=31025&q=5&ef=Disco+Beat+Down&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198323565601#!/compare/1547852400/1547938800

Bought for 25 keys and 5 ref.

25 keys

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Sale #10:

https://backpack.tf/profiles/76561198384349249#!/compare/1547942400/1548028800

Untraceable.

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Sale #11:

https://bot.tf/stats/item?def=31025&q=5&ef=Disco+Beat+Down&craft=1&aus=0&ks=0

https://backpack.tf/profiles/76561198335791307#!/compare/1552604400/1552690800

Bought for 25 keys.

25 keys

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Sale #12:

https://backpack.tf/profiles/76561198213501437#!/compare/1553731200/1553817600

https://backpack.tf/profiles/76561198819564432#!/compare/1553731200/1553817600

Sold for a Duped Flaming Lantern Gentleman's Ushanka (35 keys)

35 keys

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Minis:

Strange Professional Killstreak Australium Scattergun:

https://bot.tf/stats/item?def=200&q=11&ef=&craft=1&aus=1&ks=3

41 keys

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Duped Flaming Lantern Gentleman's Ushanka:

https://backpack.tf/profiles/76561198125791160#!/compare/1552867200/1552953600

Sold for 35 keys.

35 keys

Sales:

25, 25, 25, 26, 33, 35, 42. Going with 25 - 35 keys.