I have 4 silver certificates from 1899. 2 silver certificates from 1917. 1 silver certificate from 1891. And 1 two dollar silver certificate from 1899.
Most of them are in good condition... very little wear and tear with few creases.
Any idea what they might be worth?

Much appreciated.

I don't know if this info is accurate, but hopefully it will help you.

.: Antique Currency, LLC :. (http://www.rmcurrency.com/notes/index.php3?section=notes&page=avail_notes&category_id=1&note_type_id=2)