Based on the U.S. government legal regulations concerning limitations on gift card purchasing, within a 24 hour period:
- The maximum amount that can be purchased by a single person across multiple gift cards is $10,000
- The maximum amount that can be purchased by a single person for a single brand is $2,000
Available denominations are set by each brand, independently. So, depending upon your desired purchase amount, you can buy multiple gift cards in a single transaction -- which is fine, as long as it doesn't exceed $2,000 in a 24 hour period.