I know that you should not make fun of crazy people, but this guy is selling river rocks that he found in Pennsylvania and is claiming that they are ancient coins-- "These coins originate from treasure found in the Susquehanna river. Pribably left by roman soldiers or pirates. various denominations, historical periods, and countries/regions of manufacture."
it's hard to tell from his blurry pictures, but these are smooth river rocks.
he definitely has a vivid imagination