It depends on the condition. If your coins are very worn to the point they are hardly distinguishable, you could probably only get face value (US$0.18 each; US$0.54 total). On the other side, however, if each of your coins has a proof finish (which is unlikely), you could expect US$15 each (or US$45.00 total). It is more likely, though, you will get between US$1.00 and US$2.50 for each (US$3.00 to US$7.50 total), as those are the prices for the coin in a more intermediate grade. See here for more pricing details.
Do you happen to have any pictures of your coins? It'd be easier to give you an exact estimate if I knew what they looked like. :)