Collectors rely on numerous resources to determine the value of their coins, two of which are built and maintained by PCGS. One is the PCGS Price Guide; the other is Auction Prices Realized (APR). APR is a listing of the results from auction sales of individual coins by all the big auction houses, plus online venues such as eBay. As of this writing, the APR contains the sale records for a whopping 2,511,544 coins. No one else has an archive this large or this comprehensive. Because we update the APR after each major sale, you have access to fresh information long before any printed price guide. This can be invaluable in spotting trends (both up or down), in determining what areas of the market are hot or cold, and in making informed buying or selling decisions.
The home page for the PCGS APR is http://www.pcgs.com/AuctionPrices/default.aspx. To find out the APR for a particular coin, simply enter the PCGS number into the PCGS No Lookup box and hit Go. If you do not know the PCGS number, you can use the menus at the left and center to drill down to a particular coin. Let's look at a 1794 Half Cent (PCGS No 1003). The APR reports 17 pages for this coin in a full range of grades. Tabs at the top of the page allow the user to toggle between Brown, Red & Brown, Red, and All 1794 Half Cents. Each of the columns can be sorted by clicking on the descriptor link at the top of the column. A filter allows you to select a particular grade, PCGS-only or all services, or a date range to help fine-tune your results. Many of the auction results will link to the actual sale description as presented by the auction house, which allows you to see an image of the coin.
As always, there's a disclaimer: "Every effort has been made to ensure the integrity of the data but transcription and other errors may have occurred. Before using this information to make a buying or selling decision, confirm the data by consulting the actual sales catalog and prices realized. PCGS disclaims any liability from the use of this information."
However, if you're looking for a great way to determine the value of your coin, be sure to use this important resource.