I have a sunbeam one that was $350 when I got it ages ago.
You don't need to prefreeze anything.
You make up the "batter" and put it in.
It turns it and freezes it as it goes and once it's finished it's ready to go!!
It makes the best icecreams too!
Sent from my iPhone using Bub Hub-that's why it's full of bad grammar and spelling mistakes!