No secondary metals recycler shall purchase regulated metals property for cash consideration unless the purchase total is not more than twenty-five dollars. Purchases made from the same person within a four-hour period shall be considered a single transaction. Payment shall be made payable only to the individual named on the identification presented pursuant to section 69-402. Payment for copper and catalytic converters shall be by check, and if the purchase total for copper is more than one hundred dollars, the check shall be sent by United States mail, postage prepaid.