Originally bought as a refurbished unit. This processor has been used in a smoke free environment in a 5.1 system, mostly for music playback. I've just replaced it with the current model AV7705.
The only issue with this unit is the Ethernet port is not working or very intermittent. This unit does not have WiFi. I've been using an Apple AirPort Extreme with analog, line level RCA outputs to "stream" content to it. If you plan to stream music to this unit and other multiple devices over Airplay or Heos, you may look into the purchase of a current streaming accessory like those offered by Bluesound.
Otherwise this unit is in perfect working order and is in almost new condition. Unit is sold as-is and priced accordingly for the issue with the Ethernet port.
Here's a link to the specs on the Marantz USA website:
Note: The original box will be used for shipping is the refurbished box with no brand or model markings.