A CD can be sent as a large letter for $1.20 if it's under 2 cm's think when packed. Ask to speak with the manager if staff at your local post office want you to pay the parcel rate. By the way a parcel can now only be insured by paying for Signature On Delivery and Extra Cover which together cost more than Registered Post. Only letters can be insured with Registered Post now. Members have said it isn't easy to obtain compensation now so don't rely on that.