That appears to be an unfounded assertion given what I've found comparing inflation adjusted average car prices: https://blog.chron.com/carsandtrucks/2016/04/cost-of-a-car-i...

The average car price from 1967 is $3000 cheaper in 2016 dollars than the 2016 average car price. That may be due to a number of factors but I'm at least providing some data to back up my assertions.