This deal has ended.
Likely through 1/17, Best Buy is taking 10% off iTunes Gift Cards, a rare discount. Available denominations include a $15 card for $13.50, $25 for $22.50, $30 for $27, and the $50 card for only $45. If you're an avid iTunes user this is a no-brainer as you will automatically save money by purchasing these. And I'd stock up as I don't expect to see this again soon! Shipping is free, in-store pickup is free where available, and sales tax is charged in most states.