If you want to chat with other collectors and dealers, visit the Collectors Universe Currency Forum

The Bureau of Engraving and Printing's (BEP) takes you to the official government site of the BEP for some interesting information and facts on all of our US currency.

US Papermoney will take you to a site that is full of information on everything you ever wanted to know about our US currency. Almost everything anyway. Very cool site!

The American Numismatics Association (ANA) is a professional organization for those who want to further learn about US coins and currency.

PMG and PCGS are the only two TRUE independent currency-grading services available. I highly recommend these two companies for those of you who want to get their currency certified and graded for insurance purposes or simply, a peace of mind.