Ralph,
it was indeed unusal in 1977 for anyone to accept an old TV in trade for yet another used TV, but this was a small Mom and Pop store front in an a very smal town. I’m not certain, but I think that the population of Penngrove, Calif. in 77’ was probably around 500. I used to cut the hair of the owners wife and daughter. When I mentioned that I wanted to get a color set they told me they had a nice used Zenith portable. I believe they wanted $125.00, but I could be wrong on that. Anyway, they gave me $10.00 on trade for the 53’ Admiral, since I had bought it from them and they even delivered the “new” Zenith.
Then as luck would have it, stupid 26 year old me put a vase with flowers on top of the “new” Zenith, and you guessed it, the vase got knocked over, the water poured right down the back of the TV, and it was bye bye color TV! This happened within a month or so after I got the Zenith.
Eddie