Mini time, thank you Blaze for the sale info.

Item 1: https://backpack.tf/item/2557519860

Sale 1: Bulk

https://backpack.tf/profiles/76561198840987606#!/compare/1757289600/1757376000

https://backpack.tf/profiles/76561198248209800#!/compare/1757030400/1757894400

Sale 2: Bot dump to STN

https://backpack.tf/profiles/76561198840987606#!/compare/1759017600/1759104000

https://backpack.tf/profiles/76561199581722058#!/compare/1759017600/1759104000

Sale 3: 51k

https://backpack.tf/profiles/76561199581722058#!/compare/1759968000/1760054400

https://backpack.tf/profiles/76561199485225128#!/compare/1759968000/1760054400

Classifieds link: https://imgur.com/a/fyfN0t0

Since this has a strangifier, I've included info on the Strangifier's pricing below to show it's expensive enough that the suggestion for this is valid:

https://marketplace.tf/items/tf2/6522;6;td-30378

There hasn't been a sale for this on Marketplace in 6 years.

https://backpack.tf/stats/Unique/Strangifier/Tradable/Craftable/30378

It was priced on Backpack a year ago at 58k (so above the price of this entire hat), and I haven't seen any listings in the last month through snapshots, and buyers are at 40 keys.

Lastly, the only sale in the last year on SCM was Jul 24th, 2025, for $114.42, and even with an extremely elevated key price of $2.44 on SCM during that period, we get a sale of 46.89 keys. There are also currently 0 on the market for SCM as well.

https://steamcommunity.com/market/listings/440/Heer%27s%20Helmet%20Strangifier

https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key

All of this to say: Strangifier expensive and rare.

One in-date sale at 51 keys, taking 51 keys for this.