Owning a piece of this twisted serial killer’s history may just cost you an arm and a leg. Murderabilia website True Crime Collective recently acquired personal effects from the most notorious female serial killer ever, Aileen Wournos, including the sneakers she wore when she was arrested, and the crucifix she had around her neck when she was executed. True Crime Collective’s Jordan Cook said Wournos’ Size 8 L.A. Gear sneakers will be priced between $20,000 and $30,000, but he said he’s open to