Resuggestion, thx Shuffle Spy

History 1: https://backpack.tf/item/8405488477

Sold on Marketplace.tf https://marketplace.tf/items/tf2/30840;5;u3033

January 22: $59.99/2.1=28.57 ~29 keys

History 2: https://backpack.tf/item/8380202639

Untraceable:

https://backpack.tf/profiles/76561198853326829#!/compare/1608422400/1608940800

https://backpack.tf/profiles/76561198157383980#!/compare/1608422400/1608940800

History 3: https://backpack.tf/item/8363727831

Bulk to a Backpack buyer:

https://backpack.tf/profiles/76561198207560995#!/compare/1607990400/1608076800

https://backpack.tf/profiles/76561197966756586#!/compare/1607904000/1607990400

Then listed on Marketplace.tf

History 4: https://backpack.tf/item/7062815426

Possibly the one that sold on November 3, which is now outdated

Unsolds: 30 keys (https://backpack.tf/item/7062815426)

2 on Marketplace.tf at $59.99/2.1=28.57 keys

From Shuffle:

https://backpack.tf/profiles/76561199111354228#!/compare/1615420800/1615766400 - Sold for 30 Keys

https://backpack.tf/profiles/76561198823425555#!/compare/1615766400/1616025600 - Then dumped for 21 Keys

https://imgur.com/a/IinPqw5 - Seller at 28 Keys

28 - 29 will work