You would probably be happiest with brand new. Those ice machines develop slime. My brother is in the bar business and tells me the ice compartments can be pretty gross. The topic would come up watching that show Bar Rescue. I know another person that does restaurant inspections and vary rarely will order drinks with ice. If a drink happens to come with ice it gets a visual inspection. Places like McDonalds that get inspected frequently actually have pretty clean ice machines im told. Even though the food is junk and the employees might be a little skuzzy there is still someone entering the business trying to find that slime. A lot of restaurants pay to have a 3rd party inspect them before the "real" inspection happens.
Do those commercial machines advertise how low they get the ice? My toyhauler fridge only gets down to about 15F. Only mention because i monitor it. Residential freezers are usually closer to zero F i believe. An ice machine might go super duper low and produce some really long lasting ice.