Group 1 - The core idea emphasizes the importance of understanding the new car prices before purchasing a used car to avoid overpaying [3] - It is crucial to differentiate between "cheap" and "too cheap" when buying a used car, as significantly lower prices may indicate underlying issues with the vehicle [5] - Selecting reputable dealers with high "breach of contract" costs is essential for ensuring reliable transactions and after-sales support [7] Group 2 - Conducting thorough inspections beyond the dealer's report is necessary to uncover potential hidden problems in the vehicle [7] - Investing in a comprehensive vehicle inspection from third-party services can provide detailed insights into the car's condition, covering over 300 aspects [7] - The overall strategy for purchasing used cars should focus on stability, understanding market conditions, choosing the right dealer, and ensuring proper vehicle inspections [7]