https://imgur.com/lV5UA46 sell order 1 at 39 keys, this means 40 is high right now, this means that the item pay part must be considered using B/O.

Stormy Storm Bonk Helm mini:

item1:

https://backpack.tf/item/835470509

sale1:

https://backpack.tf/profiles/76561199102777012#!/compare/1698105600/1698192000

https://backpack.tf/profiles/76561198103405324#!/compare/1698019200/1698105600

22 keys sell low to bot invalid sale

https://backpack.tf/profiles/76561198103405324#!/compare/1698796800/1698883200

https://backpack.tf/profiles/76561198311498888#!/compare/1698796800/1698883200

bulk 154 keys

https://backpack.tf/profiles/76561198311498888#!/compare/1702339200/1702425600

https://backpack.tf/profiles/76561198008315371#!/compare/1702339200/1702425600

20 keys

https://backpack.tf/profiles/76561198008315371#!/compare/1702857600/1702944000

https://backpack.tf/profiles/76561199102777012#!/compare/1702771200/1702857600

Stormy Storm Bonk Helm +18 keys = Cloud 9 Officer's Ushanka

Stormy Storm Bonk Helm take 20 keys here

20+18=38, it should be 38-40 keys, sell order 39 keys will in range which conform to the rules.