Check the listing for details. Great Condition! Warm Audio Bus-Comp 2-channel Stereo VCA Bus Compressor. Condition: Used, Made in China. Listed at 499.99 USD. This unit is in great condition. It has only had about 10 hours of use. It has spent its entire life rack-mounted. It is missing the press-on, outer knob on the make-up gain, which was off in the factory box and was since lost. The knob itself works perfectly fine and is not affected in any way as far as functionality is concerned. I simply chose not to glue it back on and do not now use my outboard gear enough to justify keeping all of it.