Professional Numismatists Guild
Source for reputable dealers
PCGS US Coin Price Guide
General certified prices, though somewhat inflated
New York Int'l Numismatic Convention
Popular ancient and world coin show & auctions - January
Fred Weinberg
An Excellent source for mint error coins
  The Mystery Solved Behind Why We Collect
  by Dennis Nowicki
   
  The Mind (and Hands) are Terrible Things to Waste
  by Dennis Nowicki
   
  Discovering the True Value of World Change
  by Dennis Nowicki
   
  Authenticity in Collectibles: Avoiding the Fall
  by Dennis Nowicki
   
   
   
   
   
   
   
 
 
         
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