Always, I got into when I was working as a manager at a pizza hut a few years back. I got some change from a guy, you know a handful, and when I dropped it in the respective slots in the drawer there was a dull hollow type sound. Well I had done some reading on silver and rare coins but never got into. When I heard that hollow ring I had to check it and sure enough it was a 1963, I think, quarter which is around 90% silver and worth $3 and some change. That's when I started to check not only my change but the stores everyday. Lol you shoulda seen me one day when a 1930 something $100 bill came in I was digger through my pockets and my car to come up with the cash to swap that out, lol. Wheat pennies are the main thing now.