I agree on most of that, but the reason used ones might be a bear to start is like everything else...poor maintenence. What goes wrong is that people leave old fuel in the tank and the carb goes to crap. Luckily, carbs are only about $40 and simple to replace so a used motor isn't really much of an issue in my view. All of mine (have 5) were at least 25 years old or older yet they are good working machines after a little servicing. The difference between new and used is hundreds of bucks....repairs often less than a $100. I will add, try and avoid plastic chutes...in drifted crusty snow that design compromise will screw you over quickly. Coat the chute and auger with PAM cooking spray and you will be able to throw that snow easily. Also, if buying used, inspect the impeller closely. It is like checking the teeth on a horse, it will tell you the full story on how well the machine was treated. If the teeth of the impeller are bent or busted off....pass on that one.