Closed my suggestion from yesterday in haste because I assumed I did it without the decorated weapon quality.

I recently purchased this item on the steam community market for $354.72 AUD.

https://backpack.tf/item/15119857845

https://steamcommunity.com/market/listings/440/Unusual%20Broken%20Record%20War%20Paint%20(Well-Worn)

https://imgur.com/a/AoE8uiI

Steam market price of keys on the date of purchase (26th September 2025) was fluctuating around $3.30 AUD.

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

https://imgur.com/a/FKVmfhm

354.72/3.30 = 107.49 keys (rounding down to 107 keys)

Was unable to find evidence of other sales in recent times.