Eric Holler, owner of serialkillersink.net, said he purchased the items from Christina Werner, who videotaped a garage sale at Anthony's parents' house last summer.
His site has items from Charles Manson, John Wayne Gacy and David Berkowitz, and has a whole section on Anthony -- who, it must be said, was not convicted of murder, manslaughter or child abuse. Holler said he provides a "certificate of authenticity" along with each item.
Casey Anthony was arrested and charged with the murder of her daughter, Caylee, in 2008. Anthony was found not guilty of three charges of first-degree murder, aggravated manslaughter and aggravated child abuse, but was convicted of providing false information to police.