I have a early black box from 2005. It served me extremely well on the road and in the studio. These early models take the 12AU7 tubes, so make sure to replace it with that if you decide to change the tube out as I have no idea how long the tube has been in there. The ground prong broke off the plug, but it has never effected the sound to my ears, and the knob is missing on the vari-z but that function works just fine. The blue light is also in great working order. 175 plus shipping takes it.