I was offered a dbx 10/20. How are these regarded nowadays?

It would come w/rack ears and more important, the calibrated microphone which is necessary to use the unit's pink noise generator. It allows the EQ to "adjust itself for the room acoustics at your listening position". Price is yet negotiable +/- 300$, I was told it was 1.200$ when new.

Experience with this unit, anyone?

Thanks