Walmart offers the Apple iTunes $10 Gift Card 3-Pack ($30 total) for $25 with free shipping. That yields a saving of $5 and is tied with our expired mention from six days ago as one of the best discounts we've seen on iTunes gift cards this season. Orders placed by December 19 via Value shipping are guaranteed to arrive in time for Christmas.
Looking for different denominations of gift cards? Paypal cuts 20% off select iTunes gift cards.