Hans:
I say: For fifty bucks, get it. You might be very pleasantly surprised.
My own GE 30-incher, the J 370, looked pretty damned bad when I got it. Lots of grease, lots of neglect, lots of stuff awry.
But - every single last thing on it worked! I had several days of rubbing and scrubbing, and I did replace some rusty burner trim rings and some faded knobs. But actual repairs? Not a one - and I had been braced for having some real issues.
I took a chance, and won. You might very well do the same. And remember, I had to buy my J 37O sight unseen, through Tim polkanut. Tim wasn't able to see the range plugged in. And I still won, because GEs of that era are built to last.
Go get 'em, tiger!