When a given cards count in my tradelist changes, it would be helpful for the site to check against the number in my inventory. If they are the same, then all the tradelist checkboxes for the individual card details could be automatically checked off.

Similarly if they amount is not the same (say I want to only trade 1 but have 3) but the details of those 3 are exactly the same, the site could automatically check off 1 card's tradelist checkbox.

This would be useful. Maybe set it up with thresholds. For example I usually keep 2 playsets of commons and uncommons but usually only one of rares and mythics. Could have auto trade common/uncommon > 8 && rare/mythic > 4