For example the dropdown menu says "Preferred sort"

then when you click it it has all the options

Basically every time I open a weapon's page, I want to see it sorted by price. But some people might like sort by other things.

So make a simple easy dropdown menu that will auto sort

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Separate suggestion:

Add dropdown menu to select which skin site's prices I want to see.

It's currently not showing steam price on the page unless I open a weapon's page. I want the ability to change the source of prices

See image for concept of these two features