I'm forever scouting these sites because I never have the money to order a Criterion disc + pay the prohibitive shipping (for India, it is almost as much as buying another film ). More importantly, these sites have films that are yet unreleased on DVD. You could also send them your wishlist. For instance, superhappyfun has Kira Muratova's "The Asthenic Syndrome" and Varda's "Les Creatures" (there is a non-subtitled version already available) on its "coming soon" list. I don't think anybody's going to release them on DVD in the next ten years 

Their service is impeccable. I got 10 DVDs (without frills) of yet unreleased films in ten days flat having paid only $ 3.5 dollars for shipping for the whole lot. Nobody gives me a better deal, so I'll stick with them for rare films.

M