The 1971 Challenger Pace Car was famous, but not in a good way. It was always be remembered as the Pace Car that nearly killed a dozen reporters at the Indy 500. It will the recklessness of the driver (local car dealer) that changed the policy for the selection of the Indy 500 Pace Car and Pace Car Driver forever. From 1972 on, the Pace Car would be driven by an experienced driver, and local dealers would no longer be involved in promoting or sponsoring the race. In fact, the 1971 accident scared away the Big 3 from sponsoring the 1972 race, but George Hurst saw an opportunity to promote his new 1972 Hurst/Olds, and that became the 1972 Pace Car.
This backstory of the 1971 Challenger Pace Car doesn't have anything to do with its value today, but among Indy 500 Pace Car fans, the 71 Challenger Pace Car will always be remembered as the most embarrassing Pace Car incident in Indy 500 history.
Here's the footage:
https://www.youtube.com/watch?v=OTNDPmIO4Lw