General Collector Links

Coins & Currency

NGC - Numismatic Guaranty Corporation

"The worlds largest and most trusted third-party grading service for coins, tokens and medals". NGC website has a large number of numismatic resources for the collector including their slab values, census and other information.
PCGS Professional Coin Grading Service

PCGS provides grading services for all coins and currency. In addition, the website has great resources for the numismatic collector including values and grading guides.
USA Coin Book

A great site which provides raw values, melt calculators and free listings of coins for sale. A good source for pricing of unslabbed coinage.