One thing that I’ve always found interesting about the coin market is the ebb and flow of coins that are (or aren’t) available. If you actively buy and sell coins for any period of time, you learn that certain “rare” issues or series always seem available. Other supposedly available coins can, with no good reason, go through fallow periods where they become very hard to find.   
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Proof Gold Coins – Mintage Figure Variance – While it is difficult to make sweeping generalizations about the survival rate of Proof United States gold coinage, some factors exist that help to determine the rarity of many issues. It is interesting to analyze these factors and apply them to the various denominations. For the most part, Proof gold coins have small mintage figures.   
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If you collect very rare or finest known coins, figuring out what to pay for an item that you need for your collection can be difficult. Here is a real-life example of how I came up with what I believe to be an accurate value for a one-of-a-kind coin.

The coin that we are going to use as our Coin Pricing Lab Experiment is the Finest Known 1860-C half eagle; an item that my firm recently handled.

As I’ve been working on the updated third edition of my Charlotte book, I’ve had the chance to make some interesting observations regarding the rarity of Charlotte half eagles. The overall rarity of most Charlotte half eagles has changed. In nearly every instance, this has meant an increase in the total number known for a specific issue. As an example, I estimated in the second edition that 70-80 examples of the 1840-C half eagle existed.   
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When examining surviving populations of branch mint gold coins it is easy to forget just how scarce some of these issues are in higher grades. I’d like to demonstrate a little numismatic “magic trick” and turn 200 into 20 (or less) right in front of your very eyes. Let’s take a random issue and play around with survival numbers. How about the 1848-C quarter eagle? The 1848-C is a date that doesn’t get much attention.   
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A potential new client recently asked me a basic but interesting question: which gold coins are the best investments? As those of you who know me realize, I don’t really tout coins as an “investment.” But I want my customers to make money on the coins that they purchase from me and I try to steer them towards pieces that I think will appreciate in value over the course of time.   
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