General Car Marketplaces:
* AutoTrader: [https://www.autotrader.com/](https://www.autotrader.com/)
* Cars.com: [https://www.cars.com/](https://www.cars.com/)
* Kelley Blue Book: [https://www.kbb.com/](https://www.kbb.com/)
* Truecar: [https://www.truecar.com/](https://www.truecar.com/)
* CarGurus: [https://www.cargurus.com/](https://www.cargurus.com/)
Manufacturer Website:
* Audi USA: [https://www.audiusa.com/](https://www.audiusa.com/) - You can find new Audi A4 models here, and often information on current deals and incentives.
Specialized Audi Marketplaces:
* Audiworld: [https://www.audiworld.com/](https://www.audiworld.com/) - An online forum and community focused on Audi vehicles. While it's not a dedicated marketplace, you might find private sellers or discussions about buying and selling A4s.
Other Online Resources:
* eBay Motors: [https://www.ebay.com/motors](https://www.ebay.com/motors) - While not exclusively for cars, eBay Motors offers a wide range of used cars, including Audi A4 models.
* Craigslist: [https://www.craigslist.org/](https://www.craigslist.org/) - A popular platform for buying and selling used cars, with local listings for your area.
Tips for Finding Audi A4s Online:
* Be specific with your search terms: Use keywords like "Audi A4," "Audi A4 Quattro," or "Audi A4 S-Line" to narrow down your results.
* Filter your search by location: You can often filter searches by your location or a specific radius around your zip code.
* Set a budget and year range: This will help you focus on cars that meet your financial needs.
* Read reviews and research models: Before you buy, read reviews and do your research on different Audi A4 model years to get an idea of their strengths and weaknesses.
Important Note: It's always best to physically inspect any car you're considering purchasing before you buy it. If you're buying from a private seller, consider having the vehicle inspected by a mechanic for any potential problems.
