Used Audio Technica M2 Stereo In Ear Monitor System, includes receiver, transmitter, rackmount hardware, power supply. It is the M band. No ear buds/monitors included. You wouldn't want second hand - that is gross. I would recommend getting the Shure 215 for $99 for way better audio anyways - or customs. I also have the add on ambient mic (Audio Techinca AM3)- which I will include to sweeten the deal. Typically that's another $99 new. This unit plus the ambient mic would sell new for $699... This is shipped and paypaled in the CONUSA for $450.