Kind of a personal choice really. You could log multiples and set up (x)-1 of them for trade If you feel like letting people know you got lots to go around, or do just one and put it on the trade block. Personally, I log all my multiples so as to keep track of what I have. If I have six of one, I put six cards in and set 5 for trade.
Don't do this! Log one of each card you have and THEN go and log multiples. I did that and it is taking me way too much time.
The difference between Hoarding and Collecting is Structure.
~Kris~