The reason I was agreed for that price is because the Grimm Hatte same as Blighted Beak is themed with plague which happened in 17th century. I made set Hellfire Grimm Hatte and Burning Flames Blighted Beak. Only one such set is possible in game, because Helfire Grimm Hatte is 1 of 1. Both hat is same themed and Burning Flames + Hellfire is nice combo, IMHO Hellfire is best effect for combo with Burning Flames in game, also in my opinion such combo is good matched with plague theme and 17th century, not exists other hats as good matched with Blight Beak as Grimm Hatte, only Virus Doctor but this hat is not so good with Blight Beak in set as Grimm Hatte.

https://steamuserimages-a.akamaihd.net/ugc/1468688464692637951/FDB64D5B1142C2BA1CD6197F06CA99837304B746/

https://steamuserimages-a.akamaihd.net/ugc/1465310230253649094/C4420D164B9F922E688D6EEE203497672154375E/

https://steamuserimages-a.akamaihd.net/ugc/1468688464692637379/02AB13F50F6FE2C2A3C0A40436A79FA46B59E1B5/

That combination (with beak) looks fantastic, especially with the hot gun. Does one great combination legitimate such a high price? In general i'd decline that. But with a hat the is one out of one the one

combination can set the standard.

I think 570k is very enthusiastic. But the current value of 200k is badly out of date. IMHO the Scream Fortress V effects are the best effects ever deployed in tf2. 450k would be fair, maybe 500k.

This should be considered an outlier sale. Previous owner had this hat on sale for years, listing around the 400-500 key range. Bot.tf listings history backs this up:

https://imgur.com/a/l9VzGt7

https://bot.tf/stats/listings?def=383&q=5&ef=Hellfire&craft=1&aus=0&ks=0

I myself was interested in getting this hat, but there was no way I was going to personally pay 400 keys for it. So I monitored it, hoping the seller would eventually drop the price, but alas. Still congrats, but I do believe this is an outlier sale.