History 1: https://backpack.tf/item/9382945089

Seller on Mannco.Store

History 2: https://backpack.tf/item/9069286715

Looks like bulk for the Sulphurous Bolted Bicorne:

https://backpack.tf/profiles/76561198158790586#!/compare/1609977600/1610064000

https://backpack.tf/profiles/76561198325974441#!/compare/1609891200/1609977600

Sold to a backpack buyer:

https://backpack.tf/profiles/76561198325974441#!/compare/1609977600/1610064000

https://backpack.tf/profiles/76561198032176942#!/compare/1609891200/1609977600

Sold on Marketplace.tf: https://marketplace.tf/items/tf2/30570;5;u3039

January 23: $35.9/2.1=17.1 ~17 keys, didn't seem to have a buyot

History 3: https://backpack.tf/item/9058166657

Sold on Mannco.Store: https://mannco.store/item/24982

March 19: $29.95/1.97=15.2 ~15 keys

History 4: https://backpack.tf/item/8150532036

Sold for 15 keys:

https://backpack.tf/profiles/76561198138664594#!/compare/1610409600/1611273600

https://backpack.tf/profiles/76561198107984600#!/compare/1611187200/1611360000

History 5: https://backpack.tf/item/8018877871

12 keys match in buyer's compare:

https://backpack.tf/profiles/76561198035780190#!/compare/1610236800/1610323200

https://backpack.tf/profiles/76561198199425379#!/compare/1610323200/1610668800

Dumped to Quicksell.Store:

https://backpack.tf/profiles/76561198199425379#!/compare/1614902400/1614988800

https://backpack.tf/profiles/76561198850274253#!/compare/1614816000/1614902400

History 6: https://backpack.tf/item/3355653251

Dumped to Quicksell.Store for 12 keys:

https://backpack.tf/profiles/76561198054825186#!/compare/1614729600/1614816000

https://backpack.tf/profiles/76561198850274253#!/compare/1614816000/1614902400

last sale is a bot transfer

Unsolds:

Mannco.Store at ~36 keys

Backpack.tf 22.52-30 keys (the 30 sellers have been there for a while) https://imgur.com/rNwF25F

Sales at 12, 12, 15, 15, 17

Given one of the 12 sales was a buy order dump and buyers are up to 11.47, 12 looks a bit on the low side

Gonna stick with 15-17 for now