Fribiz is a website just like Lockerz only better. You get points when you signup and for every cool activity you have on this website.
The prizes vary from I phones to PlayStation and different 25-50$ gift cards like Ebay or Amazon. The best part about Fribiz is that they give your points back after the auction ends and even more they pay you some extra points for your effort.
Practically you cannot miss the chance of winning easy prizes.