1. Aftermarket Alternator:
- Low-end: Around $70 to $120
- Mid-range: Around $120 to $180
- High-end: Around $180 to $250
2. Genuine Honda Alternator (OEM):
- Dealerships: Approximately $250 to $400
- Online Retailers: Approximately $200 to $350
Please note that these price ranges are estimates and can change based on current market conditions, promotions, and specific part numbers. If you're looking for a replacement alternator, it's recommended to verify compatibility with your Honda Civic's model, year, and engine type before making a purchase. You can do this by checking with a reliable auto parts store or mechanic.