The price of a rolling mill is primarily driven by its motor power (kW), roll diameter, and automation level. For industrial applications, ensure the mill features hardened alloy steel rollers (HRC 58-62) to prevent surface deformation. High-precision units should include automatic gauge control (AGC) systems and variable frequency drives (VFD) to ensure consistent thickness tolerances within ±0.01mm. Additionally, the housing structure (cast iron vs. forged steel) significantly affects the machine's vibration damping and long-term structural integrity.