[quote name='B56']It is scary how much these things cost. Any size bigger than 20 would help a lot.[/QUOTE]
I don't have any help for you, but I got lucky and found a 20 gig drive for only $14.95. I know it's only 20 gigs, but $15? I bought a banned 360 off Ebay for dirt cheap that didn't have a hard drive (wanted to use it for system link). For some reason Halo 3 requires a hard drive for system link play, so I needed to get one.
I got it at this random record store place. Almost like a thrift store buy specialized in records and cd's and movies and stuff.