How can I browse for Items on PlayStation and combine that with another filter (e. g. "PGems")?

I can browse the Market for offers on PlayStation by clicking on the Playstation-Button.

Now I see all offers, but cant use more filters:

If clicking next for example on "WTB" (to see, if anybody on PS would need the stuff, I could offer),
I see all the buying offers on all platforrms.

But I dont see a way to combine the search for Playstation-Trades with another filter.

Could anyone please tell me, if and what I do wrong? And what to do to fulfill my filter-needs?

This is when your search becomes complex enough that you can't use the browse trades section anymore - go to Find Trades and you'll be able to mix and match filters to your heart's desire, but will require a keyword.

The Browse Trades tool was just a quick thing I made last minute, not intended for deep multi filters at the moment.

I tried a fast query with "Find Trades" and find it very satisfactory - that's exactly what I looked for! I will use it in the future frequently.

Thank you for your explanation und much more for your amazing work! This site is really, really great and so nice designed! Chapeau!