Credit to Shuffle Spy for augmenting my price suggestion!

https://backpack.tf/profiles/76561198045749377#!/compare/1677542400/1677628800 - ?

Billycock sales:

https://backpack.tf/profiles/76561198271442469#!/compare/1676332800/1676592000 - 19 Keys

https://backpack.tf/profiles/76561198074992626#!/compare/1673913600/1674864000 - Low

https://backpack.tf/profiles/76561198043826027#!/compare/1674604800/1674691200 - ?

https://backpack.tf/profiles/76561198091585647#!/compare/1674691200/1681257600 - ?

https://backpack.tf/profiles/76561198453530349#!/compare/1675641600/1675728000 - ?

https://gladiator.tf/time-machine?item=Disco+Beat+Down+Counterfeit+Billycock&at=2023-05-06T14%3A28%3A00.000Z - 1 month seller at 18 Keys

Hotrod sales:

https://backpack.tf/profiles/76561198043826027#!/compare/1678924800/1679702400 - Bulk sale

https://backpack.tf/profiles/76561198087763379#!/compare/1680048000/1680134400 - Well above the 50 Key buyout, so this shouldn't be used

https://gladiator.tf/time-machine?item=Disco+Beat+Down+Hotrod&at=2023-03-26T06%3A39%3A00.000Z

https://backpack.tf/profiles/76561198087763379#!/compare/1681603200/1681689600 - ?

Your purchase at 36 Keys is perfectly valid to use here. Not sure why you didn't. - adding to inclusion now

Conqueror sales:

https://backpack.tf/profiles/76561198043826027#!/compare/1678492800/1678579200 - ?

https://backpack.tf/profiles/76561199079079285#!/compare/1674604800/1674691200 - 17 Keys + ~0.5 Keys of Items

https://backpack.tf/profiles/76561199111073161#!/compare/1673827200/1673913600 - ?

https://backpack.tf/profiles/76561198063658197#!/compare/1673654400/1673827200 - ?

https://backpack.tf/profiles/76561198096569755#!/compare/1669161600/1669248000 - ?

https://backpack.tf/profiles/76561198311498888#!/compare/1669507200/1669593600 - 16 Keys + ~0.5 Keys of Refined

https://backpack.tf/profiles/76561198358201430#!/compare/1669766400/1669852800 - Sprinkled Delights Throttlehead + Smoking BWW (low)

95 + 36 + 18.5 + 17 = 166.5 Keys, which can be rounded to 167 Keys

https://marketplace.tf/items/tf2/30833;5;u270 - Seller at 147 Keys

https://backpack.tf/item/12264442163

https://cdn.discordapp.com/attachments/146449414360268801/1104419538625380372/image.png

147 to 167 would work as a range here.