According to Backpack Premium Search, there are only 4 Time Warp Virtual Reality Headset in existence, 2 of them last seen 12 months ago.

Sale 1 - 09/23/23

The current owner paid 100 Keys pure + Strange Australium Scattergun + Strange Australium Rocket Launcher

Image proof of the trade (current owner). Note: The current owner is from Finland, that's why the image he shared me it's in other language.

Previous owner backpack after the trade

New price suggestion

I'm taking Aussie Rocket Launcher as 48 keys: Gladiator sales

I'm taking Scattergun as 45 keys: Gladiator sales

100 + 48 + 45 = 193 keys, rounding to 195 keys flat.