Online shopping has become one of the most popular methods through which people buy things like home goods, clothing, or in some cases, groceries. However, online shopping also offers another convenience: the option to buy secondhand directly from the seller. As such, OfferUp, eBay, and Facebook Marketplace soared in popularity. But like all good things, there’s bound to be at least one downside. One woman from Australia is shedding light on a Facebook Marketplace experience, and it’s sounding alarm bells for women everywhere.