This compressor is in mint/like new condition. I have only had it a few months. I bought it to experiment with compressors again only to confirm that I prefer to play without one. This one is nice in that it offers a variety of presets that are VERY usable as well as manual control of the compression. The unit is a half rack with an internal power supply and included in the sale is the rack mount kit. This rack kit fits the BlueMax. It is also capable of holding a second BlueMax or other Presonus 1/2 rack units like the Acousti-Q preamp, Bluetube or digitube. This is pretty decent little compressor for the money. I think it sounds better than any dbx compressor that I have tried. It is less breathy sounding with far less compression artifacts. Price is $100 FIRM shipped to the 48 states. Paypal greatly preferred. No trades. Many thanks.