As a coin store owner, customers frequently ask me where to find up to date pricing information for coins. My standard answer is that firstly if it is in print its out of date. Even the weekly price guides provide information that is at least two weeks old between publication and receipt, and the yearly journals (e.g. Red Book) have very stale information.

Relevant, pricing information typically updated daily is on the internet at sources including:

www.ngccoin.com/price-guide provides prices for coins in NGC holders

www.pcgs.com/prices provides prices for coins in PCGS holders

www.coinprices.org provides fair market value prices for coins

www.coinworld.com/coinvalues.html provides fair market value prices for coins

There are many other additional sources of up to date coin price data.