I wish I'd seen this 2 weeks ago. I paid $50 for a Corona. I think I got a bigger grain hopper. I don't know how they can sell for $15 unless it's a Corona Knockoff.I didn't think there was that much of a Mark UP. I'm not that sold on a Corona, the plates wabble. I get everything from flour to what looks like uncrushed grain with the same settings. I'll try it a few more times and if I don't get better efficiency I'll junk it and buy one with rollers.