PayPal Digital Gifts on eBay is offering a $10 Best Buy coupon when you purchase a $100 Best Buy gift card. There’s also another offer for $15 Best Buy coupon when you purchase a $150 Best Buy gift card. The codes are emailed within a few hours of purchase but they usually arrive faster than that. Bonus code must be redeemed by 10/12/2016 so you should probably buy these only if you have an upcoming purchase at Best Buy.
PPDG purchases earn 5x on Chase Ink cards so that makes this deal much better. You can also earn 2% back in eBay Bucks and also cash back through a shopping portal. iConsumer has the best cash back rate right now for eBay at 1.3% ($20 cap per month). Giving Assistant is offering 1.2% (maximum of $50 Cash Back may be earned on any single purchase) and TopCashBack is offering 1.1%.