it depends on what year it was made The previous answer is correct, but there really isn't a "Napoleon quarter". 25ยข coins are only called quarters in the US, Canada, and a few other...
No more than the sh*t i just took
it really depends on the condition and what kind and color they are they can range anywhere from 1000-3500 depending on condition
multiply the weight of the coin in troy oz. times .720 (% of silver in the coin) times the price of silver at the moment, from <http://www.kitco.com>
near 6 maybe in very fine condition 15 - 20 Canadian dollarsfar 6 anywhere from 100 - 350 Canadian dollars