Hi Nolan,
Thanks for your reply. It's always good hearing from a fellow Zenith collector.
The MJ-1035s are out there; it just takes some looking to find them. This model isn't exactly rare, but they don't show up on ebay every day either (as you no doubt have noticed).
I'd try searching under "Zenith radio", which will return all listings for every Zenith radio currently up for auction on the site. A model-specific search, such as "Zenith MJ-1035", will return listings only for that specific model. I'm sure both searches will work, as I've tried it with several different Zenith (and other) models of radios and TVs in the past; it's always returned the model(s) I was after. Just to be 100 percent sure, though, I'll do a test search after I send this message.
BTW, you are probably right as to $77 being too much to pay for a radio of 1960s vintage (I only paid something like $25 for my K-731 a couple years ago). I guess some folks don't really know the value of these radios and are trying to get as much money as they can from the auctions. I've seen this happen when the seller says he or she "must sell" the radio ASAP; this often means the seller needs the money in a hurry and/or in the worst way. Another tipoff to a seller that wants or needs the money from an auction fast is a note with a link under the "Buy it Now" button which states "immediate payment required" or similar wording.
Again, good luck finding another MJ-1035. I've never owned one, but I've heard very good things about them, so they must be good radios even today, 40+ years after their introduction.
Kind regards,