* No central registry: There's no global database tracking every sports car ever manufactured and currently in existence.
* Defining "sports car": The definition of a sports car is subjective. Different people have different criteria (engine size, performance capabilities, design features, etc.). A car considered a sports car in one country might not be in another.
* Used car market: The number of used sports cars fluctuates constantly due to sales, scrapping, and imports/exports.
While we can't give a precise number, it's safe to say the number is in the millions, but a more accurate estimate would require extensive and likely impossible data collection across every country.
