Since the feedback forum only has boards for site related issues, I've posted this here.

A lot of times, I've accidentally sold things in my armory chest that I didn't want to.
I wouldn't then notice that i'd sold the item until it was too late.

What would be a great feature is if the items that are currently being used in a gear set would show up with some sort of highlighting or additional mark. This way, no one would have to worry about checking whether the weapon or armor was part of their set.