Well, took me nearly a whole year to get a high tier unusual of one of my favorite hats.

Can't find any other ones that have been sold recently.

Had to close the previous suggestion as another one has sold.

Sale #1

Sold for 273 keys.

Buyer's compare link:

https://backpack.tf/profiles/76561197973496139#!/compare/1678924800/1679011200

Seller's compare link:

https://backpack.tf/profiles/76561199085116273#!/compare/1678838400/1678924800

Item History:

https://backpack.tf/item/308563132

Sale #2

Bought for 280 keys.

https://imgur.com/a/9JfqJmu

My compare link:

https://backpack.tf/profiles/76561197970757009#!/compare/1675641600/1678579200

Seller's compare link:

https://backpack.tf/profiles/76561198118922746#!/compare/1677715200/1677888000

Item History:

https://backpack.tf/item/248502686

Taking 273 - 280.