Posted By:
jeff sbut if I'm on the right track, let me suggest "shoebox" style boxes that are designed to hold cards in holders. They are like the traditional "monster" 5,000-ct boxes and their kin, but are a little taller and wider, and are available with 2 or 3 rows. I also store most of my vintage singles in semi-rigid holders and need a way to continue sorting--it has worked great for me. I am able to get them at my neighborhood card store, though that's the only thing they're good for.
Jeff