In one of my games I have four of the Warden's Shield that gives +3 Leadership Defense...fine item, but I have an even better shield, so I have all four sitting in my bag (and it's a big map so it will be forever to give them to other heroes).
It'd be nice if I could sell them in a castle or go to a merchant shop to do so...I realize this isn't needed for most maps, but ones with a lot of ruins and very large it would be a nice to have!
Two other options would be to add more items and/or limit only 1 version of the item in the map (the latter makes sense to do if it is codeable).
Collecting items is one of my favorite things to do, and I can't wait until there are quests to track down an item!