For the next few days there's a large number of "Presents" in the Cash Shop. Each present contains five or six past limited release items each connected to a theme that covers each present.
One present is called the Gambler, and it contains another present in the shop, or a rare, non-listed Super Prize present with extremely valuable limited release items.
Each present cost 999GC, and when gifted to another user from the Cash Shop (or yo can "gift" it to yourself) you'll be PMed a coupon code that gives you 10% off your next GC purchase through a credit card or PayPal.