Heads up, Apple fans! Best Buy is offering a sweet deal: Buy a $100 Apple gift card and snag a free $15 Best Buy gift card. That's essentially free money if you're planning on buying anything from either store. This is perfect for gifting season, or just treating yourself while getting a little something extra. Why should you care? Well, $15 is $15! Plus, the Doctor of Credit article notes that you can potentially stack this deal with other offers like AmEx Offers, U.S. Bank Offers, or even Paypal's Pay-in-4 option for an even bigger discount. It also may stack with the Apple Holiday Gift Card Event running at Target. So, do the math, and see if you can come out ahead!