Halo 3 Legendary Editon includes cat helmet

Because a regular "Collector's Edition" just isn't geeky enough, here's what will be included in the
four-disc
Halo 3: Legendary Edition according to 1up:
- Cut-scenes from the Halo games with DVD-style director's commentary
- An uspecified number of documentaries, including a look at the way Halo fans have extended the fiction
- A "cat-head sized" (1up's description) Spartan helmet that you put over the four discs as a display piece.
- The actual game.
No word on what all this fanboy fun will cost. How many Halo fanatics will pay top dollar for the chance to cram a Bungie-approved torture device on Toonces' head? What's a fair price?