I handle a fair amount of cash, and I kept these because I thought the serial numbers were cool. They are in what I would say is average condition (I don't have a way to post pics at the moment), and I will probably keep them regardless of value just because I like them. Anyway their serial numbers are: E19444419E and F02100022G They are both 2006 series. Also, is there a resource for researching, so I don't have to keep asking? Thanks for the help!
Some folks may call "19 4444 19" a quad (four of the same digits in a row) with bookends ("19" on each end). I don't see anything in the other serial number. This is my glossary of terms: http://www.panix.com/~clay/currency/glossary.html
I agree with Clay, not much extra value with the first due to condition, and desirability. In CHCU it might have pulled in $5 to $10. You might find someone willing to gave 1 to 2 extra for it. If you like it and/or it fits your collection, then why not keep it. Good Luck Darryl