From 9to5Toys.com:

Update: Best Buy is now down to 15%. Still worth your time.

Best-Buy-iTunes-cards-deal

Today only, Best Buy knocks 20% off the price of physical iTunes gift cards across the board from $15 -$100 (including the very handy $10 three-pack). iTunes gift cards are good for music, videos, iBooks, movies, and iOS/Mac Apps.  They can be ordered site-to-store for pick-up up until 3PM on Dec 24th or ship for free if you don’t need them by Christmas.

If you are looking to buy an email-redeemable iTunes credit, Walmart still sells a $50 emailled iTunes credit for $40, though readers sometimes complain about Walmart’s reliability.

Obviously, these make great last minute gifts/stocking stuffers and are an easy way to get 20% off all of your Apple media.

Amazon also offers gift cards that can be sent via email, Facebook or printed out in any denomination.

Best-Buy-iTunes-Cards