The bundle is centered around the "Four Games, One Pick" PS4. This includes the system and a code entitling you to a download for one of four games that you can choose from: Destiny, NBA 2K15, LittleBigPlanet 3, or Far Cry 4. You'll also get six months of PlayStation Plus (in the form of two three-month subscription cards), entitling you to even more free games for as long as your subscription remains active.
All of this will run you just $360, which is $40 less than the system alone ordinarily costs. Toss in the game and PlayStation Plus membership, and you're looking at saving in the neighborhood of $130.
This deal is currently available on eBay, though limited quantities are available. There's no indication of exactly how many units are left, but whatever the case, the sale will come to an end the morning of Monday, March 2.