I removed my old system and upgraded to a 622. The 508 receiver is new in the box and has never been installed. I also have the one I was using. What is the value, if any, or is it not worth messing with?
The 508 doesn't have a monthly DVR fee so it is still popular for DVR buyers. I would expect $50-75 but as with any auction it depends who is buying at the time..