How to Price Very Rare Coins

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.