I'm glad your luck was better than mine with the OLD Scottsman flakers. I went thru two in a year (one the auger bit the side with no warning, the other the tranny went -- both repairs would have cost more than I paid for the machine. Sold 'em on eBay for parts)Also, in my area, finding someone who knows the older machines is a problem. I will never buy a used flaker again. I'd buy a new Scottsman tomorrow if I found a good price on it (Superior Restuarant Supply often has them on sale) since my luck with the NEW ones has been very good. People generally like the flaked ice, but word is the cubes displace more pop, which means you're selling less product and more frozen water with cubes.
So, at the risk of answering the question: If you want a flaker, get it NEW. If you're buying used, cubers seem to be the better bet, IMNSHO.