https://backpack.tf/item/11056705555

16 keys (near ID doesn't work but the histories match, and the same matches in buyer's compare too):

https://backpack.tf/profiles/76561199059160806#!/compare/1699747200/1699833600

https://backpack.tf/profiles/76561198204379861#!/compare/1699660800/1700006400

https://backpack.tf/item/3384495996

Added a Holy Grail Taunt: Zoomin' Broom for a Beaming Beacon Taunt: Zoomin' Broom:

https://backpack.tf/profiles/76561198128792431#!/compare/1699056000/1699142400

https://backpack.tf/profiles/76561198399634901#!/compare/1697587200/1699056000

Both have roughly the same market (sellers at 20 and buyers at ~11), so the sale will most likely end up being too high there and too low here, excluding

10 keys match in buyer's compare:

https://backpack.tf/profiles/76561198399634901#!/compare/1699660800/1699747200

https://backpack.tf/profiles/76561197991710013#!/compare/1699747200/1699833600

https://backpack.tf/item/11149688670

Untrace:

https://backpack.tf/profiles/76561198029355679#!/compare/1696118400/1698883200

https://backpack.tf/profiles/76561199245733895#!/compare/1698796800/1698883200

Bulk:

https://backpack.tf/profiles/76561199245733895#!/compare/1704844800/1704931200

https://backpack.tf/profiles/76561198050518375#!/compare/1704844800/1705017600

Buyers at ~11 so 10 looks low, going with 16 flat