I have one M910 8 speed xtr rear derailleur I'm not using. I would describe the condition as well used, but still very functional. The lower pulley is showing wear, and the main body of the unit has scratches that are normal for used mountain biking parts. I bought it used myself, and used it for about a year, and it has, and still does perform well as all XTR components. I am selling it because I recently put all new derailleurs on my bike, so this has to go. Thanks for looking.