So this is a weird thing that DC came up with for the Watchmen 30th Anniversary. It's a box set collection of hardcover single comics. Sort of marketed for the same crowd that's buying the hardcover editions of The Dark Knight III The Master Race, it came out in November and it retails for $125.
From a reading standpoint, hardcover singles actually make sense for Watchmen above all other comics series. Watchmen was never intended to be consumed as a graphic novel. Alan Moore and Dave Gibbons designed each issue to be parsed individually, and when you read the series that way, it takes on a whole different and wonderful layer of design and story craft that is lost in the graphic novel format.