This is a Shimano XT rear derailleur, model number RD-M750, for Mega 9 speed drivetrains. This is a long cage model. This derailleur came off a bike that I seldom rode. I’d be surprised if there are more than 500 miles on it. The pivots are smooth with no binding or excess play, and the return springs are nice and snappy. All bolts and threading are A-OK. There is very little wear on the pulleys; they are good for many more miles. Cosmetics are also generally nice. I have posted large photos. Please take a look. Thanks!

 I have uploaded large photos. Please take a look. Thanks!