When evaluating a mini bus, the engine performance and emission standards (such as Euro IV, V, or VI) are paramount to ensure compliance with local environmental laws. Buyers should verify the seating capacity (typically 10-30 seats) and the chassis durability, as these directly impact the vehicle's lifespan. Additionally, check for safety features including ABS (Anti-lock Braking System), EBD (Electronic Brakeforce Distribution), and reinforced body structures to meet international passenger safety benchmarks.