If you think children ran things then go ahead.
In 1965 boomers ranged in age from 1 year old to an old man teenager of 19 years old, I don’t know how many teens and 8 year olds could afford those expensive cars.
All of my teen aged friends in the ‘60s had those cars. Myself, I had a sequential string of used Triumphs, a TR2, a TR3, two Spitfires, and eventually a TR4. Sometimes we worked for them, sometimes our parents bought them for us. I don’t recall paying more than $700 for any of those Triumphs.