Sale 1:

Accursed Taunt: The Boston Breakdance

https://backpack.tf/profiles/76561198067893369#!/compare/1588032000/1588118400

https://backpack.tf/profiles/76561198418740133#!/compare/1588032000/1588118400

no sales for breakdance:

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Sale 1:

SCM

https://backpack.tf/profiles/76561197963394917#!/compare/1592265600/1592352000

https://backpack.tf/profiles/76561198081925059#!/compare/1592352000/1592438400

Sale 2:

Valiant Vortex Backbreaker's Skullcracker(16.5)

https://backpack.tf/profiles/76561198418740133#!/compare/1588032000/1588118400

https://backpack.tf/profiles/76561198067893369#!/compare/1588032000/1588118400

Sale 3:

bulk

https://backpack.tf/profiles/76561198067893369#!/compare/1590278400/1590364800

https://backpack.tf/profiles/76561198148511293#!/compare/1590278400/1590364800

cant be used to price breakdance due to 2 months unsold at 15: https://imgur.com/a/T28qYUm

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Sale 2:

14 keys

https://backpack.tf/profiles/76561198418740133#!/compare/1593475200/1593648000

https://backpack.tf/profiles/76561198055458073#!/compare/1581811200/1594598400

Sale 3:

https://marketplace.tf/items/tf2/31038;5;u133

$35.27 / $1.89 = 18.66 keys

https://backpack.tf/item/8156480783