PSA: POE2 has an official Trade Auction house built into their game

[SolutionS]

POE has an official trade site built into their game and their website.

https://www.pathofexile.com/trade2/search/poe2/Standard

You can change modes if you play HC

I have no idea why they don't make players aware of this in game but its built into their website and the stash system

Here is a solid guide https://www.youtube.com/watch?v=FRSpRV3_itg&t=12s