This is an important point. The low prices of a lot of hobbyist-grade motors and motor controls are driven by their use in consumer electronics. I can buy an entire 4-axis stepper motor controller with drivers for under $100 because they are made by the thousands for laser cutters and 3D printers. OTOH a similar professional controller will set me back at least a few hundred $$, if not a few thousand due to being designed for a harsher environment and for higher reliability.