I have a Korg DTR-1000 rack tuner for sale. It's in pretty good shape. There are some scratches here and there. On the face there is one ding (see the photo below) but it is not on the display portion. The only technical flaw is that one of the LED segments on the note display is kind of intermittent. Obviously it doesn't affect the ability to tune, but it does make it a little difficult to tell between a B and a D. Otherwise the unit works great - locks on to notes fast, has multiple tuning modes, can be calibrated and pitch adjusted, handles Low B great, great accuracty, front and rear inputs, mute, etc. It has a short 1' power cord which is just long enough to reach a power conditioner in a rack without any slack. I also have a longer cord if you'd prefer that. I'm de-racking and moved to a pedal tuner, so I don't need this one any more.
Asking $100 plus shipping.
Asking $100 plus shipping.