Keep in mind:
* That's in 1930 dollars. Adjusting for inflation, that translates to a significantly higher amount in today's money (well into the tens of thousands of dollars).
* The range is broad. A basic Ford Model A could be closer to the lower end, while a more luxurious car from a company like Buick or Chrysler would be closer to the upper end or even exceed it.
* Used cars were considerably cheaper, offering more accessible options for families.
So, while a specific price is impossible to state, the $600-$1200 range provides a useful context for the cost of a family car in 1930.