Well, okay, these aren't real gift cards. These are single-use discount codes. You purchase the dollar amount you want, and we send you a personal discount code that you can email or give to anyone you choose. They're good indefinitely.
The big difference between these codes and a real gift card is that you have to redeem the entire dollar amount in one shot. The system doesn't remember any "leftover".
Fine print: Only one code can be used per order. The discount does not apply to shipping. Redeem by entering the discount code in the "Special Orders" window at checkout.