I am surprised by the seller not disclosing more info about the poor electricals. I've bought machines with plugs cut off to say "Don't plug it in until you have done serious repair." But since he knew you wanted to make it into a Hand crank I 'll cut him a bit of slack. I enjoy my 128 HC and many children have used it, too.
And as far as that, "the last I really wanted." just wait. You have heard the siren call before. It will happen again. Enjoy it.
Welcome to the fun from Kansas.