I play very casually and almost exclusively singleton formats (Cube, EDH, casual singleton).
So owning even just 2 of the same card of different edition isn't super interesting to me.

I'd like a filter that would let me find which cards I own over a certain quantity from my inventory eg :

Quantities I own [>=/<=] <number field> from [all sets combined/Individual set]

Even more important, I'd love to be able to find which cards from a tradelist I don't own with this same filter.[/all sets combined/Individual set][/>]