1. CASH a/k/a Federal Reserve Notes (FRNs) - wrap in aluminum foil, carbon paper or newspaper or mail in security envelope with order form.
2. Money Order
3. Check
4. Credit Card online (U.S. only). Only Visa and Mastercard accepted.
*NOTE: Currently no tangible wealth is being used as a medium of exchange in payment for goods and services. Using credit as "money" is the problem with the economy and the reason for its fluctuating value and purchasing power. We are stuck with this dishonest system as long as the population remains ignorant of the difference between real money and credit.