PayPal Digital Gifts on eBay is selling discounted iTunes gift cards. You can purchase a $100 iTunes Gift card for just $85, which gives you a 15% discount.
On top of that, you can also earn 5X Chase Ultimate Rewards points if you pay with a Chase Ink Plus, Chase Ink Cash or Chase Ink Bold card through PayPal. That should give you a discount of at least 20%.
- Purchases are limited to 4 per buyer
This is a great discount for personal use, but it can even get you some cheap Ultimate Rewards depending on your reselling relationship. You can also find more discounted gift cards on eBay here.