Thank you AKs for offering up the suggestion!

Mini for reasons

Item 1

https://backpack.tf/item/2041422985

Sale 1

https://backpack.tf/profiles/76561198049884052#!/compare/1600128000/1600214400

https://backpack.tf/profiles/76561198846276257#!/compare/1600041600/1600214400

260 keys match

Sale 2

https://backpack.tf/profiles/76561198846276257#!/compare/1600387200/1600473600

https://backpack.tf/profiles/76561198137934248#!/compare/1600387200/1600473600

Sold for Cheart Rack and keys

Checking each individual key history let me know that

https://prnt.sc/v4q0rw - in fact, all 45 keys were involved

Misc hype go brr, will resuggest the Hearts Rack

Mini for Cheart Rack - https://backpack.tf/suggestion/5f933133024a58180c148a32 - 335 keys

335 + 45 = 380 keys

https://prnt.sc/v5nl2f - buyout at 340 keys

Capping at 340 keys

Sale 3

https://backpack.tf/profiles/76561198137934248#!/compare/1600819200/1600905600

https://backpack.tf/profiles/76561198097499917#!/compare/1600819200/1600905600

Bulk for Knifestorm Tyrant's Helm

Excluding

Sale 4

https://backpack.tf/profiles/76561198097499917#!/compare/1601251200/1601337600

https://backpack.tf/profiles/76561198056793885#!/compare/1601251200/1601337600

Bulk

Excluding

Sale 5

https://backpack.tf/profiles/76561198056793885#!/compare/1602115200/1602201600

https://backpack.tf/profiles/76561198114402400#!/compare/1602115200/1602201600

Bulk for DUPED Stormy 13th Hour Exquisite Rack

Excluding

Sales

260, 340

Taking 260 – 340 keys!