Trade column for Quantity Needed?

The current way the trade columns are set up is a little confusing.  I frequently have users doing things like offering me 4 copies of a card that I only need 1 of due to this. 
If there were another column like Quantity on other user's wishlist, then it'd be easy to see how many you could bump a particular card up to when you're reworking stuff also.  Just a thought!