When assessing the price of a HOWO trailer truck, you must focus on the engine horsepower (typically 371HP, 400HP, or 430HP), the emission standard (Euro II to Euro VI), and the drive type (6x4 or 4x2). Higher horsepower and stricter emission standards will increase the initial cost but offer better long-term fuel efficiency and regulatory compliance. Additionally, verify the transmission type (manual vs. AMT) and axle load capacity (e.g., HC16 or AC16 heavy-duty axles) as these directly impact the truck's towing capability and durability in harsh environments.