Try to understand that many of the low mintage coins were made for many reasons. Some during a war where materials for coins just not available. Some low mintages from a new coin introduction and tne Mint not sure how it would work out. Remember the 2 or 3 cent coins. Then also note the population difference from say the 1932 Quarter compared to todays population of our country. We now have sell over 300,000,000 people in the USA. So proportion wise a coin made in 1932 such as the quarter at hundreds of thousands was not that low a Mintage back then compared to a population of much, much less. Also, you must remember that back then coin collectors didn't hoard tons of coins like today so a large production of any coins was just not required. Example is when I was a kid there were Liberty Head Quarters,
Standing Liberty quarters and even an occational Sitting Liberty Quarter in circulation. Most people didn't think of them as worth more than a quarter and probably never would be worth anything. Who Knew, HUH? Way back when I was a kid if you even had a quarter, you were rich so how could anyone collect such things.