When assessing the price of a car body shredder, you must look beyond the sticker price and evaluate motor power (kW), torque capacity, and blade material. High-end shredders typically use H13 or D2 tool steel blades which are vacuum heat-treated for longevity. Ensure the machine features a heavy-duty planetary gearbox to handle the high-torque demands of crushing scrap metal. A lower price often indicates thinner steel plates for the machine body or lower-grade bearings, which will lead to higher maintenance costs in the long run.