eBay has a range of gift cards on sale today at great prices. A number of cards are being offered by PayPal Digital Gifts, which means that they should code for 5X with a Chase Ink Plus card. Cards sold by SVM will not earn 5X and have recently been coding as cash advances for Visa and Mastercard. Keep an eye on the seller and be sure to use an Amex if buying gift cards from SVM.
Remember that the purchase of gift cards no longer earn eBay bucks, so this will not stack with the targeted 10% back eBay bucks offer.