Feature Request: Filter option for cards involved in trades

As I often export my trade list for purposes of using it to sell cards elsewhere, it would be very useful if I was either

A) Able to filter out cards involved in a trade via an additional filter (easy) or
B) Have an additional number that indicates how many copies of a card are involved in a trade (thus I could subtract this from the number I have available for trade, and that's the number I could sell to a buylist).  This number would need to be exportable.  A little harder maybe?

This would be very useful as I often have multiple trades ongoing, but still want to sell all my low end crap easily to buylists (and entering this into DeckBox I find to be highly useful as I can then slice and dice the data in excel to sell to the buylist optimally).

Going through 24+ pages of tradelist to manually exclude the cards involved in trades is time consuming, and very tedious, and is also error-prone.