You can buy $100 eBay Gift Card for only $95 through PayPal Digital Giftcards. The gift card will be sent out with email delivery to the email address associated with your PayPal account.
There’s a limit of one per buyer and about 10,000 gift cards available but they will still probably sell out fast.
You won’t earn any eBay Bucks when buying eBay gift cards, but you will get 5% if you pay with your Ink card through PayPal. Don’t forget about cashback portals, although it’s very YMMV on eBay gift cards.