The NGC US Coin Price Guide shows average dealer retail prices based on actual, documented transactions and other information reported by collectors, dealers and auction houses for NGC-certified coins. The price shown is the average dealer retail price, excluding any sales tax, for an NGC-certified coin in a standard holder with a standard label and does not reflect any premiums for special holders, labels or designations unless otherwise specified.Retail prices for collectible coins can vary between dealers – sometimes significantly – based on a number of factors, including short-term pricing trends, eye appeal, trading frequency, special characteristics, market availability, demand and precious metal spot prices. Further, because the NGC US Coin Price Guide prices are only updated from time-to-time, they do not reflect short term pricing trends, which are quite common and are often quite dramatic, given the volatile nature of the collectible coin marketplace. This is especially true for rare coins, where there are fewer sales and greater variations in sale prices. For all of these reasons, the prices in these guides are designed to serve merely as one of many measures and factors that coin buyers and sellers can use in determining coin values. These prices are not intended, and should not be relied upon, to replace the due diligence and — when appropriate — expert consultation that coin buyers and sellers should undertake when entering into a coin transaction. As such, NGC disclaims all warranties, express or implied, including, but not limited to, the implied warranties of merchantability and of fitness for particular purpose, with respect to the information contained in the NGC Price Guides. By using the NGC Price Guides, the user agrees that neither NGC nor any of its affiliates, shareholders, officers, employees or agents shall have any liability for any loss or damage of any kind, including without limitation any loss arising from reliance on the information contained in the NGC Price Guides., The 2002-S Sacagawea Proof Dollar is fairly common. It has a mintage of over 3.2 million. Other examples in the series have mintages closer to 1 million and are much scarcer than the 2000-S Proof Sacagawea Dollar. Most examples were struck well ranging from about PR68-PR69 Deep Cameo condition., 2002 S Sacagawea Dollars were struck only as Proof coins. USA Coin Book Estimated Value of 2002-S Native American & Sacagawea Dollar (Proof Coin) is Worth $7.21 or more. Click here to Learn How to use Coin Price Charts. Also, click here to Learn About Grading Coins..