DO NOT BOTHER. I can attest that the system for damaged equipment is not implemented yet. Whether your equipment has 100% durability, 50%, or 0% there is no difference. Items that reach zero durability do not disappear, un-equip, or cease to function anymore. I ran around with every piece of equipment on my character with zero durability for awhile. It surprised me once I noticed it and thought that maybe it was hampering my effectiveness. So I went to lengths to get it all repaired or replaced with the same items. Guess what? No difference. I then swapped out completely broken items with non broken items and tested back and forth. Again there was no difference. So until something is implemented, do not bother and have fun.