What? These are a little obvious, but deserve mention. Microsoft's commissioned a ton of Halo 3 merchandise, from the pea soup green Special Edition 360 to the Todd McFarlane designed controllers. However, you might prefer the design - and price - of MadKatz's offerings.

Where? Microsoft or MadKatz

How much? $30 for the faceplates and skins. The controllers will set you back $50 to $60 each and that limited 360 is a whopping $400.