Call all your local GameStops and ask them if they have any new Legendary Editions for sale. A few weeks ago I scored a new Legendary, minus the helmet, for $30 new (and completely unopened-not even the slit across the security tape). It came with all of the cases/discs that my original Legendary had....just no helmet. The guy I talked to was a store manager, and he'd taken the helmets home to use as Christmas gifts.
Probably sold out, but they weren't advertising and the manager I talked to seemed impressed I knew about it. Found out about it here, so there's a thread buried around here somewhere. I'm too lazy to find it myself, and Farcry 2 is calling my name. Good Luck!