Huge thanks to aj and Xergoyf for providing sales and evidences for this suggestion

sale 1

Sold out for Hat of Undeniable Wealth And Respect (380keys)

1:1

https://backpack.tf/profiles/76561198014383676#!/compare/1703116800/1703376000

https://backpack.tf/profiles/76561198013423985#!/compare/1703289600/1703376000

https://steamuserimages-a.akamaihd.net/ugc/2301967354021842128/6611A03924C201DE310737A9B2E560D4B75C6CD5/

https://steamuserimages-a.akamaihd.net/ugc/2301967354021842396/997D30D9FA97A775BA028043230985AABD423B67/

Sale 2

https://backpack.tf/item/13347564976

https://backpack.tf/profiles/76561198077087560#!/compare/1705968000/1706054400

https://backpack.tf/profiles/76561198190395023#!/compare/1705968000/1706054400

https://backpack.tf/profiles/76561198190395023#!/compare/1706659200/1707004800

https://backpack.tf/profiles/76561198261483133#!/compare/1706659200/1706745600

Dead Presidents Pyromancer's Mask - https://backpack.tf/suggestion/65e33c34170544b1d80e8917 - 236.5 keys

Dead Presidents Blighted Beak - https://backpack.tf/suggestion/6624684842b78fb4f00ce801 - 235 keys

Screaming Tiger Taunt: The Fist Bump - https://pastebin.com/bG4BNzZM - value at buyers because no usable sales, 4.7 keys

Isotope Warborn Scattergun (Minimal Wear) - https://pastebin.com/MASRqEKk - 44 keys

236.5 + 235 + 4.7 + 44 = 520.2 keys

range 380~520keys seems fine then