Eclipse mania is sweeping the country. On April 8, millions will be gazing up to catch a glimpse of the once-in-a-lifetime event. Manufacturer Mark Margolis says there has been a flood of counterfeit solar eclipse glasses that have hit the market. Inside Edition found an ad on Craigslist offering 500 pairs of glasses for just $100. An Inside Edition producer went undercover to meet up with the man selling all those glasses. Inside Edition’s Les Trent has more.