There are many books available that deal with foreign coin identification.  They can be found at your neighborhood book store or local coin shop.  Many online retailers can ship you a specific foreign coin identification book that is found on their site in less than a week.  New books are being created every year and many of them are specialized, dealing with the coins of one specific country or region.  Some foreign coin identification books go so far as to be about several types of coins created in the same country in the same era. 

These books are one of the best ways to determine the value of your foreign coins in addition to assisting you in foreign coin identification.  The values will not be exact, but you will be able to get a rough idea of what the coins are worth.  With this prior knowledge, you will have a better chance of avoiding scam artists and getting ripped off.  These books can also provide a starting point for negotiations dealing with expensive rare foreign coins.