https://backpack.tf/item/6131175857

12 keys:

https://backpack.tf/profiles/76561199085116273#!/compare/1703116800/1703203200

https://backpack.tf/profiles/76561198137924934#!/compare/1703116800/1703203200

https://backpack.tf/item/10838903478

10 keys:

https://backpack.tf/profiles/76561198105071091#!/compare/1700092800/1700179200

https://backpack.tf/profiles/76561199099521803#!/compare/1700092800/1700179200

Buyer then sold it on Mannco.Store, which is unusable

https://backpack.tf/item/2724053848

Bulk:

https://backpack.tf/profiles/76561198096044051#!/compare/1701302400/1701388800

https://backpack.tf/profiles/76561199245733895#!/compare/1701302400/1701388800

Dumped to STN, possibly in bulk:

https://backpack.tf/profiles/76561199245733895#!/compare/1701302400/1701388800

https://backpack.tf/profiles/76561199026390261#!/compare/1701302400/1701388800

Untrace:

https://backpack.tf/profiles/76561199026390261#!/compare/1701734400/1701820800

https://backpack.tf/profiles/76561198389656864#!/compare/1701648000/1702166400

~~

https://marketplace.tf/items/tf2/1111;5;u3071

December 30: $29.99/1.706=17.68 ~18 keys

key price https://marketplace.tf/items/tf2/5021;6

(1.7+1.68+1.68+1.68+1.74+1.74+1.72)/7=1.706

https://backpack.tf/item/2838516491 Quicksell.Store dump then listed on Mannco.Store

~~

(credit to Lemons)

2 sellers were at 10 keys on SCM

https://gyazo.com/7fed7225e0b6df683354937d72ecd758

https://gyazo.com/2b5765a53e335424ebfd32325b40f73d

even lower a few days later https://gyazo.com/6804661ed8920dea27e16c65c6fbe553

£15.93 / £1.73 = 9.2 keys.

They then disappeared but neither of the sales can be traced.

18 is definitely an outlier here. Based on Lemons' advice, going with 10-12 keys here