I know it may be not such a touchy subject but I was just wondering how people felt about when someone else wants you to actually send cash through the mail especially when buying a mantis or other things and I have always believed that it is illegal and also It is unwise to mail cash anywhere in the world, including the First World, and illegal in the United States. It is against policy, but not illegal, to send cash via most carriers, such as FedEx or UPS.