It seems like several Wicked Wood Blasts are listed at ~200-220 keys https://backpack.tf/stats/Unusual/Blast%20Defense/Tradable/Craftable/126

Also please clarify what the sale was

For this suggestion, you will need to mini the blast defence by looking at past sales for it. For example, it looks like it sold for 180 keys here https://backpack.tf/profiles/76561198058356352#!/compare/1655078400/1655164800

https://backpack.tf/profiles/76561198062290614#!/compare/1664150400/1665705600 - Looks like you sold it for a bunch of stuff that caps at 365

https://gladiator.tf/time-machine?item=Misty+Skull+Tartan+Tyrolean&at=2022-10-09T02%3A08%3A00.000Z - Your buyout was 365 Keys

The Blast Defense also potentially sold for 190 Keys

https://backpack.tf/profiles/76561198282873040#!/compare/1661990400/1662163200

Then again, it has a seller at 160 Keys current.

That should still cap at 300 Keys, but for future reference, you cannot use sellers' listing prices in lieu of an outdated hat's price.

A range of 300 - 365 would work here if the first sale I linked is accurately shown in your compare.