When comparing prices, you must look beyond the unit cost and evaluate the measurement technology (Diaphragm vs. Ultrasonic). Ultrasonic meters generally command a higher price due to their lack of moving parts and higher precision. Key specs include the flow rate (G1.6, G2.5, G4), working pressure range, and battery life, which should ideally be 10 years or more to reduce long-term maintenance costs. Ensure the meter supports Automatic Meter Reading (AMR) or Advanced Metering Infrastructure (AMI).