COH / COV is the one thing I would never get rid of any of my physical stuff.
I still have the original COH box, manual, cd's from 2004, the COV pre-order box, manual, cds with the Scorpion figure, the first printing of the Prima Strategy Guide and even a mousepad from NcSoft with COH and some other games on it.
I love to browse through the guide - I think it was out before even the first game update so there is SO much that is different from how the game changed over the years.
Like telekinesis for a Mind Controller was only a group fly - later changed into something much more useful.