Raindance,
What are the dimensions of the unit W, H, D? How much does it weigh? Is it able to go into a so-so ventilated cabinet with quite a bit of room without causing too much heat? How old is it? Could be very interested. What is the continuous output of the receiver per channel? Does it have 5 or 7 speaker capability? Does it have 1 or 2 subwoofer outputs? So many questions, so little time.
Thanks for your time and answers,
Bob
The Internet Bob.. The internet.

everything you can ever want to know about a 5800 lives there including user testimonials, reviews, pics, maybe even a user and service manual etc. Google Denon AVR5800. It's a killer unit. I have one that I use from time to time just to try out speakers , I even have the Remote and the RF Cradle, which by the way is model RC8000 . Like Raindance said, you can find one on that auction site. A Harmony remote can also control the unit although visually it lacks that over the top "our remote is cooler than your's "Apparently Denon was targeting Marantz and Philips' Design ethos.
Great unit, still meets 5.1 standards (and has 7 channels of amplification) with a Blu Ray player you're able to do the latest and greatest multi-channel formats. Heck, an Oppo 103 or 105 even has 2 extra HDMI inputs so you can use that for HDMI switching.
GLWTS Raindance. great unit. here's a shot under the hood ( my 5800 ) for the audio voyeurs:
