Thanks everyone. I'll call the lady tonight and ask her some questions. Yeah, I like the cabinet too. Very much. I'm not sure what the designation is between a and b. I think it has to do with the motor housing.... and I don't know which is better.
By squinting at the pictures, it looks like the electric may need a new cord, or to be redone. If so, I might be able to ask for less. It's been for sale for a month... and I just stumbled across it today.