Baquack Obamailure Posted:

Found two bugs: items with italics in their names will also have their attributes italicized, and can’t auction a spare copy of a .moar file if you have a copy equipped.

edit: Already filed a bug report, obviously. Log in to see images!

That is not correct. You can sell copies of things that are equiped. It is very likely that you are trying to sell an item that is damaged. Items do not show up if they are less than 100%.