Also, look for box sets. A lot of those came out with some really great extras. And not on the discs, but in the boxes. Like, there's a box set of Breakfast at Tiffany's that comes with a copy of Audrey Hepburn's personal script including all the notes she scribbled in it. Or, One Flew Over the Cuckoo's Nest which came in a 200-page coffee table-style book about the making of the film. Hell, any fan of that film should have that even if they don't have an LD player!
Also, I don't think the Brad Bird animated series Family Dog ever came out on DVD, did it? There's a neat little box set of that.
CINEMA PAFF - Your BB-Movie Showcase *
* - The extra B is for BYOBB