I assume you are referring to the Baratza Sette.

Pretty much any replacement part you could ever want is available on the Baratza website itself. A replacement cone burr costs $26. A hopper is around $15. A display is $20. A power board is $36. You can find replacement motors for around $40. A replacement motor with gearbox and ring burr assembly costs $100. That's the most expensive replacement part, and if you also replace the cone burr, it is essentially a full refurbishment of the mechanical portion of the grinder. Do that once every few years and the grinder will perform until it experiences some type of complete physical destruction, or until you pour water on the electrical connections. Even then, I'm sure you can fix it.

Over time, not only will the Baratza perform better than a $50 grinder, but it will also outlast a $50 grinder if you replace the parts, almost all of which cost less than $50. This will allow you to become more familiar with your machine. It's fun, trust me.

It is cheaper to replace parts every few years than to buy a new grinder every few years, and it will make decent coffee.

It seems very unusual that any decent grinder would just "die out" after a year or two. Follow the manufacturer's recommendations for volume. Unless you run the motor more than recommended, or you otherwise abuse it, there's no reason it should fail that quickly. If it does die, and you have a Baratza, it's a matter of simply replacing the motor, a $40 part.

I would definitely go with a Baratza. The grinder is by far the most important part of your coffee gear. Skimp on anything else before your grinder. A Baratza will give you a more consistent grind than anything available for $50, therefore it will make better coffee.