A lot of the "rules" of coin collecting goes out the window once you start talking Colonial Coins. Actually many of the Federal era coins are worth big bucks even in dug, corroded condition, due to true rarity. I have seen worn out dug Chain Cents go for over ten thousand dollars IF it is a rare variety, and that is regardless of the fact it was dug, worn and corroded.
Actually mintage number is NOT ALWAYS a true indicator of rarity status, the number of collectors in the market and the number of "known" coins/buttons/whatever determine the true rarity and values.
The Colonial collecting community has been trying to standardize for years their rarity rating system, and if you look at auctions for those coins you will see ratings such as R-1 thru R-9. Those are more or less true rarity ratings based on KNOWN numbers , for example if R-9 is the rarest, it would be Unique, meaning only one known to exist. where as a R-1 would mean common in that maybe thousands exist.
The 1916D is common by mintage numbers when compared to a lot of the early coins, but there are many more dime collectors in the world than Colonial and even Large Cents, so it is the old rule of Supply and Demand for value.
I will be writing an article or two hopefully sometime this winter and I will try and include this subject in one of the articles.
Rarity, value, condition is a very undetermined factor that depends on many things to make something warrant the desirability to be collected in the first place.
Nice subject, but no simple answers.
However, when you are talking the Colonials and certain rare early year American coins, the more found and put on the market CAN reduce the Rarity rating and value, so MD'ers can and do have an effect on the coin world market, in a subtle way.
Don