In my knowledge Lamborghini Veneo Roadster is the expensive supercar it costs over 3.3 million Euro. Take a look at the most expensive cars in the world for the below links. World best Top Super Cars
Here I list 8 most expensive supercar it the world:
There are more expensive supercar in the world. But I like this supercar mostly. Here you can visit car accessories blog https://www.bestnetreview.com/best-ceramic-coating-for-cars/ to know about car parts. I found this website to know about ceramic coating and I also find many important article about auto products. This site have complete guide line how to install all the car parts and how it work. I hope you can also find some important article what acctually you're looking.