https://backpack.tf/item/5343652807

https://marketplace.tf/items/tf2/15105;5;u703;w3;pk70;kt-1;festive

$49.99 = 28 keys

https://backpack.tf/profiles/76561198173984617#!/compare/1568419200/1568505600

https://backpack.tf/profiles/76561198403196579#!/compare/1568419200/1568505600

Sold with 2 keys for Strange Pro KS Kritzkrieg (~27 keys)

This sale is 25 keys. Thank you k1ng.

https://backpack.tf/profiles/76561198403196579#!/compare/1568332800/1568419200

https://backpack.tf/profiles/76561198056014750#!/compare/1568332800/1568419200

18 keys + 90 refined, which comes up to quicksell price

https://backpack.tf/profiles/76561198173984617#!/compare/1571270400/1571529600

https://backpack.tf/profiles/76561198173984617#!/compare/1571270400/1571529600

Sold for Subatomic Phononaut + 3 keys

[[Phononaut:

https://backpack.tf/profiles/76561198125894529#!/compare/1566432000/1566518400

https://backpack.tf/profiles/76561197975080743#!/compare/1566172800/1566518400

Added 4 keys for Kill a Watt Salty Dog

[[[KaW Salty Dog

https://backpack.tf/profiles/76561197999845696#!/compare/1568592000/1568678400

https://backpack.tf/profiles/76561197993987295#!/compare/1568592000/1568678400

Bulk

https://backpack.tf/profiles/76561198170041861#!/compare/1568073600/1568160000

https://backpack.tf/profiles/76561197999845696#!/compare/1567987200/1568160000

https://backpack.tf/profiles/76561197999845696#!/compare/1568246400/1568332800

https://backpack.tf/item/2635503498

I have no clue what's going on, sold from bot to a user 1, then traded to user 2, then traded back to user 1, then eventually sold in bulk.

https://backpack.tf/profiles/76561198079841650#!/compare/1570665600/1570752000

https://backpack.tf/profiles/76561198089253101#!/compare/1570665600/1570752000

Untraceable

https://backpack.tf/profiles/76561198197739413#!/compare/1572480000/1572566400

https://backpack.tf/profiles/76561198197739413#!/compare/1572393600/1572480000

https://backpack.tf/profiles/76561198089253101#!/compare/1572480000/1572566400

https://backpack.tf/profiles/76561198089253101#!/compare/1572393600/1572480000

Untraceable

https://backpack.tf/profiles/76561198205939253#!/compare/1572393600/1572480000

https://backpack.tf/profiles/76561198205939253#!/compare/1572480000/1572566400

https://backpack.tf/profiles/76561198155110999#!/compare/1572393600/1572480000

Untraceable, but most likely quicksold to bot

https://backpack.tf/profiles/76561198311816724#!/compare/1564876800/1566000000

https://backpack.tf/profiles/76561198197292179#!/compare/1565913600/1566000000

Untraceable

:/ i dont know man

]]]

]]

So basically, KaW Salty Dog has no mini -> Phononaut has no mini

i exclude sale 4 of rockit launcher

Looking at current sellers on the Phononaut (months unsold at 24), this would fall within the range of 25-28 keys.