Sale #1:

https://backpack.tf/profiles/76561198197394305#!/compare/1544572800/1546646400

Untracable.

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Sale #2:

https://backpack.tf/profiles/76561198133991629#!/compare/1549670400/1549756800

Bulk.

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Sale #3:

https://backpack.tf/profiles/76561198132226518#!/compare/1549929600/1550102400

Cash sale?

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Sale #4:

https://backpack.tf/profiles/76561198147602484#!/compare/1550102400/1550275200

Untracable.

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Sale #5:

https://backpack.tf/profiles/76561198357865695#!/compare/1549670400/1550188800

https://bot.tf/stats/item?def=338&q=5&ef=Disco+Beat+Down&craft=1&aus=0&ks=0

Sold for 24 keys and 20 ref.

24 keys

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Sale #6:

https://backpack.tf/profiles/76561197994697258#!/compare/1553385600/1553472000

Sold with a Festivized Specialized KS Jag (.75 keys) for 3 keys, a ToD ticket (.45 keys), a Festivized Killstreak Freedom Wrapped Soda Popper (Minimal Wear) (6.7 keys), Taunt: Square Dance (.45 keys), Taunt: Rancho Relaxo (.5 keys), a Killstreak Phlogistinator (.4 keys), a Circling Peace Sign Human Cannonball (21 keys), a Strange Festivized KS Scattergun (1.1 keys), and 22 ref (.5 keys).

3 + .45 + 6.7 + .45 + .5 + .4 + 21 + 1.1 + .5 - .75 = ~33.45 keys

Taking keys at 45.66 ref.

33 keys

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Sale #7:

https://backpack.tf/profiles/76561197994697258#!/compare/1553472000/1553558400

Unsure.

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Sale #8:

https://backpack.tf/profiles/76561198080179568#!/compare/1551312000/1551398400

Unsure.

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Sale #9:

https://backpack.tf/profiles/76561198446046760#!/compare/1553472000/1553558400

Unsure.

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Sale #10:

https://backpack.tf/profiles/76561198060837654#!/compare/1553472000/1553558400

Unsure.

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Minis:

Circling Peace Sign Human Cannonball:

https://backpack.tf/profiles/76561198263576246#!/compare/1550361600/1550880000

Sold for a Starstorm Insomnia Nasty Norsemann (20 keys) and a Taunt: The Schadenfreude (~1 key).

21 keys

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Starstorm Insomnia Nasty Norsemann:

https://backpack.tf/profiles/76561198080179568#!/compare/1549843200/1549929600

Sold for 20 keys.

20 keys

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Festivized Killstreak Freedom Wrapped Soda Popper (Minimal Wear):

https://marketplace.tf/items/448;15;w2;pk210;kt-1;festive

Sold for $11.99.

$11.99 / $1.79 = ~6.7 keys

6.7 keys

Sales:

24, 33. Going with 24 - 33 keys.