When assessing price points, the most critical factor is the thrust-to-weight ratio. Buyers should look for engines offering thrust ranges from 45N to 300N+. Higher-priced models typically feature full autostart capabilities, brushless starter motors, and integrated telemetry sensors that monitor RPM, EGT (Exhaust Gas Temperature), and fuel flow in real-time. Ensure the engine includes a high-quality Electronic Control Unit (ECU), as this component dictates the stability and safety of the turbine.