I also have some red letter 2$ bills with low years. And I have some silver 1$ bills with pretty low serial number on it, the only prob with that one is someone prior wrote thew number 14 on it in pen, not that big though... any suggestions on were to start.. I can't figure out the books, how about sites? Thanks:confused:

Here are some searches for you.

U.S. Paper Currency Value - Google Search (http://www.google.com/search?hl=en&safe=off&q=U.S.+Paper+Currency+Value)

Silver Certificates Value - Google Search (http://www.google.com/search?hl=en&safe=off&q=Silver+Certificates+Value)