rare DVDs/Blu Rays that are actually good?

[Gbpxl]

The only ones I can think of are The Third Man, Apocalypto, and Dawn of the Dead. But it seems one can find those at any given moment on eBay. in the gaming world, there are titles that you wont see pop up for months, even years. Are there any films like that? And are any of them good? Just doesnt seem like there is much out there in the movie world that is sought after the way Little Samson or Jurassic Park: Operation Genesis are.