Updated suggestion with 3 more sales, wanted to thank Sir Spoon The Second for the item histories.

Sale 1 - 11/09/23

https://backpack.tf/item/10488589081

Quicksell, the current owner told me he bought it for 95 keys pure.

Image proof of the trade (I contacted current owner)

Sale 2 - 12/04/23

https://backpack.tf/item/8080004550

112 keys pure

Current owner backpack after the trade

Previous owner backpack after the trade

Sale 3 - 01/04/24

https://backpack.tf/item/10156055402

112 keys + 24.22 refs, thats ~112.4 keys

Image proof of the trade (I contacted current owner)

Sale 4 - 01/28/24

https://backpack.tf/item/14101070206

I bought a Blizzardy Storm Gauzed Gaze, traded a Collector's Darwin's Danger Shield + 40 keys pure for it.

Image proof of the trade (my own trade history)

Previous owner backpack after the trade

There isn't any Gladiator statistics related to the Collector's Darwin's Danger Shield but I bought 1 on 01/14/24 for 80 keys (image proof of the trade), also quickbuyers at 75 keys (backpack.tf buy listings).

I'm taking the Collector's Darwin's Danger + 40 keys as 120

PS. I'm using this inventory history viewer script for Chrome.

New price suggestion

4 sales within 3 months at 95, 112, 112.4 and 120 keys.

I'm considering the first sale at 95 keys as an outlier since it was a quicksell.

Low value: 112 keys(sale 2 and 3)

High value: 120 (sale 4)