This article is from the Paper Money Collecting FAQ, by Bruce Giese email@example.com with numerous contributions by others.
A 1976 two dollar bill has no inherent market value unless
there's something else about it to make it valuable. A number
of other two dollar bills have been printed with series
1963, 1953, 1928 and previous. The older notes are generally
worth more, but their value depends on the signatures.