What is Value? Basically, there are four different types of "value" for coins and bills: Book (or "catalog") value Buy price Retail value Wholesale value Book value is an average of many dealers' retail prices for a certain coin or bill - in other words, what the average dealer would sell it for. This price is called the "book" value because you would typically find it in a published book such as the Standard Catalog of World Coins. Buy price is the price that a dealer would be willing to pay you if you sold him or her your coin or bill. Retail value is the price for which a dealer would sell a coin or bill to you. So, if a dealer wants to stay in business, he or she usually offers lower buy prices than retail prices. Wholesale value is the price for which a dealer would sell a coin to another dealer. Wholesale value can also be a discounted price that a dealer would accept from a buyer who is purcha...