This is a web scrapper that has scraped auction data from bring a trailer of all 911 GT2 RS's sold on their platform. This includes listing details, color, VIN, etc.
This scrapper also has information on where it was sold and by which user. This is done to be able to gain insights on how many different factors may affect the value of a car and by how much. (Note this only includes the cars and not parts/wheels sold)