I know you probably don't want to do this since it will increase database usage, but how I sort my cards I do it by Box. So RedRares1, RedRares2, LandRares.

I would like to be able to know which box to look in right away so I can possibly make new boxes such as <$1.00 rares, >25$ rares, Trades but will be able to tell right away which box to look for a card I know I have so I can put it in another box when the price changes.

You could make decks and sort them into folders, ie; deck name: red box 1 in folder red rares

Problem is that the deck does not pull from the real inventory of what you have. It let's you know if the card is in your inventory, though which will help. Also when adding cards to the deck you can't set a card "FOIL" and be priced accordingly.

What I am looking for is the ability to move one card from one group to another.