Hmmm, it appears that it's still not sortable by cost, only by clan, level, max level, and something else (don't remember right now). Would really be cool if there were more filters for all the tables (ranks, character market etc).
I don't think that's what he means. If I interpret correctly, he's asking for a
way to sort directly by cost, that is, which character costs the least. BTW,
that works for all filters except level: It shows only the cheapest instance
of a character, and for level it shows the cheapest at each level.