The price is primarily driven by the automation level, mold dimensions, and production speed. Buyers should look for machines featuring PLC control systems (such as Siemens or Mitsubishi) and touch-screen interfaces for precision. Ensure the machine has a high-efficiency vacuum system to reduce cooling time and stainless steel steam chambers to prevent corrosion. A machine with a larger effective mold area (e.g., 1400mm x 1200mm) will have a higher upfront cost but offers better scalability for various box sizes.