I am struggling with finding an efficient way to record duplicate cards. As a set collector, I some times have multiple complete sets or near complete sets plus extras that could be available for trade. I haven't found a good way to add these duplicates to my collections without having to click into each card and either adding to collection or adding to sell/trade. Does any one have any good strategies on handling this? I have 6-7 thousand cards that aren't part of a set that I need to organize and record and I would prefer to find a more efficient way.