The person who paid 46 Keys dumped this to the Kaguya bot for what has to be much less, but it's not clear exactly how many Keys that was.

https://backpack.tf/profiles/76561198272148004#!/compare/1744848000/1745625600 - Some of the Keys they got for the Puffy were used for the Noir

https://backpack.tf/profiles/76561199072654974#!/compare/1745452800/1745539200 - The Noir was sold to them for 27 Keys + 22 Refined

https://backpack.tf/item/12865743392 - Several of those 27 Keys have Kaguya in the history just before Scrapyard

The Puffy was then quicksold with a Phantom Plague Second-Hand Headwear for 73 Keys, but I don't know the breakdown of how many Keys were for each.

https://backpack.tf/profiles/76561197987314855#!/compare/1745452800/1745884800

https://scrap.tf/auctions/ZLF1GM - The Puffy was then auctioned off for 32 Keys after being listed for a little bit on backpack

32 flat would be better here.