I found a SX 1980 in our local recycle discard box for electronics yesterday, never seen one before had to get a friend to get it for me. 78 lbs is way over my limit at 71 years old. had a few small knobs missing and a little dirty. Now what to do with it. I saw on Ebay 2 knobs sold for 75 & 50 , So I guess it was a good find...llol