We have a vintage McIntosh 2105 Solid State Stereo Power Amplifier on consignment.  Clean, in good condition, with few scratches of any kind.  Works well.  Specs:  105 W/ch minimum into 4,8, or 16 ohms, .25% distortion from 0 watts to 105 watts.  Have reprinted owners manual, no original box.  This is a classic that has increased in value over the years.