Walmart has an online iTunes eGift Cards 15% off sale going on that makes for some nice savings through tomorrow only! You can get a $50 eGift Card for iTunes for $45 or a $100 card for $85, while supplies last. The maximum is two cards per customer.
Disclosure: I am a participant in the Walmart Moms program. Walmart has provided me with compensation for the time and effort spent creating this post. However, my participation in this program is voluntary and my opinions are my own -- always have been, always will be.