Best Buy takes 15% off all Apple iTunes Gift Cards. With free shipping, that's the best deal we could find on these cards and the first time we've seen them discounted in several months. After the discount, a $15 gift card costs $12.75, a $50 gift card costs $42.50, and a $100 gift card costs $85, among others. They're good for both music/video and app purchases.

Update: According to its weekly ad, Target retail stores are knocking 20% off Apple iBooks and Apps Gift Cards. Although these are iBooks and App themed cards, they can be used on anything in the iTunes Store.