An ever-increasing number of consumers are eschewing physical media for purely digital content, and a large subset of those buy it through Apple's iTunes Store. If you're one of those consumers, you might want to check out Best Buy's deal today — you can get a digitally-delivered iTunes gift card for 20 percent off. They're available in denominations of $15, $25, $50, or $100, but are selling for between $12 and $80. These credits are delivered digitally, so there's no shipping to pay for or physical cards to worry about losing. You can use these cards to buy anything in the iTunes Store you desire, from music and movies to books and apps. Note that these cannot be used for hardware or products from the Apple Store (online or offline) — it's for iTunes only. If you're an iTunes fan, this is basically like free money, so go hit up Best Buy now. While these sales may pop up from time to time, they don't last long — so act quickly.