A friend of mine showed me a 1932 US quarter and two late 1800s halves he bought off ebay. They were not collector quality and had some wear but not a lot. They were fake. Not silver. Very good copies.
Be wary. I thought quarters were too small and ordinary to be worth a counterfeiter's time but obviously not so. My friend has bought US silver dollars, silver half dollars, and quarters from ebay that were openly advertised as replicas. This is legal if they have "COPY" incised into the coin. All of them were advertised as marked COPY but none of them had that required word on them. The fakes used non-magnetic alloys. Be careful with what you buy.
Everyone that buys US silver coinage needs a good method of testing. On that note, I'd like to know what method people use to detect non-magnetic fakes. My hearing is not so good as to be able to depend on listening to the ringing sound. I don't want to carry a vial of acid with me everywhere (risk of leaks).