I removed the bottom cover and checked for continuity on the primary of the output transformers, and they appeared to be OK. Everything else was clean underneath.
So the output transformers are OK, as I tested the secondaries from the back of the set. So to restore it, it needs a power transformer, most of the tubes, and the knobs, so it my be best for parts. The receiver measures roughly 17 ½ by 5 ¾ at the front, and is 13 ½ inches deep, not counting the control shafts. It should be great for restoration, or to use for parts.Please see my other auctions for more radio and audio items, and tubes. The item "Fisher Model 500C Stereo Tube Receiver for Parts or Restoration" is in sale since Sunday, May 15, 2016. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Stereo Receivers". The seller is "jrcradio" and is located in Edmond, Oklahoma. This item can be shipped worldwide.