Documentation: Always ask for the car's documentation, including maintenance and repair records, ownership history, and any other relevant paperwork.
Market value: Research the current market values for the specific classic car before making an offer. This will prevent you from overpaying and ensure that you are getting a good deal.

Authenticity: When buying a classic car, it's important to ensure that it is authentic and not a replica or a clone. Ask for a certificate of authenticity and conduct a detailed inspection to verify its authenticity.
By paying attention to these factors, you can increase your chances of buying a classic car that meets your expectations and holds its value.