History 1: https://backpack.tf/item/7957068507

only 2 keys match:

https://backpack.tf/profiles/76561198048851745#!/compare/1645142400/1645228800

https://backpack.tf/profiles/76561198136812758#!/compare/1645142400/1645315200

10 keys 10 ref, ~10 keys:

https://backpack.tf/profiles/76561198136812758#!/compare/1645142400/1645315200

https://backpack.tf/profiles/76561198115841780#!/compare/1645228800/1645315200

Sold alongside 8 keys and a TOD Ticket for a Double-Spelled Strange Pro KS Backburner:

https://backpack.tf/profiles/76561198115841780#!/compare/1645315200/1645401600

https://backpack.tf/profiles/76561198014273034#!/compare/1645315200/1645401600

the Backburner can't be mini'd because it doesn't have any other in-date sales, excluding

SCM:

https://backpack.tf/profiles/76561198014273034#!/compare/1649203200/1649635200

https://backpack.tf/profiles/76561198353285318#!/compare/1649721600/1649894400

https://steamcommunity.com/market/listings/440/Unusual%20Little%20Buddy

April 14 8 PM: $19.01/2.14=8.88 ~9 keys

~~

https://marketplace.tf/items/tf2/612;5;u7

https://backpack.tf/item/6689787161

$19.39 / $1.77 = 10.95 keys ~11 keys

$19.39 / $1.73 = 11.21 keys ~11 keys

taking 9-11 keys here