I've had 2 of those cabinets, and am fairly certain that each leg unscrews from the cabinet. The cabinet itself, however, is pretty long and wide, so I don't know what sort of a plastic tote it would fit into. The legs might unscrew from the stool seat as well.
Finding a machine, cabinet, and matching stool, for that price, in what looks like good condition, doesn't happen very often, so I would try best you can to get it all home.
The shipping price could kill the deal though.