NECA makes some of the coolest prop replicas around (including this awesome Portal gun) and their latest creation is one we've been waiting for. The Half Life 2 Zero-Point Energy Field Manipulator (Gravity Gun for short) won't be available until April, but you can get on the mailing list to stay in the loop.
The Gravity Gun is 1:1 replica of the weapon seen in Valve's "Half-Life 2." It's made out of molded plastic and features orange LEDs, two handles, two triggers and even makes four sounds from the game. To make it the ultimate collector's item, NECA has equipped it with a fold-out kickstand that should make it a breeze to display. Just make sure your friends keep their hands off, we wouldn't want anyone getting flung across the room.
ThinkGeek has been chosen as one of the few retailers that will be getting this bad boy in stock. However, the product page says they'll have very limited quantities when it finally arrives in April. Once they're gone, they're gone forever.
To help you get your hands on one they've graciously set up a mailing list. Just give them your e-mail, and they'll let you know as soon as orders are being accepted.
There are also a slew of other retailers taking pre-orders. You can find the full list on NECA's website.