One thing you can do is make up a little business card that says in quick, plain plain English stating the types of coins you are looking for and your name and phone number. Then, take that card to a number of different convenient stores and gas stations, leaving it with the attendant. Tell them, when they get something, to please call you, and you will run right over and buy it from them. You will probably have to negotiate on the price here and there, but I've had some decent luck with the method. I once picked up five standing liberty quarters for two bucks each doing this. And the best part was that all I had to do was just wait for the phone to ring. You can also check Craigslist, see what people are trying to sell and make them an offer. Everything for sale on Craigslist is negotiable—whether they admit it or not. Also, go check all of the return slots and the floor underneath your local Coinstar machines. Occasionally a silver dime will find its way there. Good luck!