Again, thanks for all the information.
To be honest, I'm not toooo concerned with original release or re-releases, as long as I like the artwork and photographs. I think I'd only be upset if I were sold something deceptively as original, when it clearly is not. I'd like to protect myself against that if possible. I am just interested in increasing my knowledge about the cards in general, perhaps I should try to investigate some on the Spanish-speaking side of the internet (though my Spanish is about 70%).
But for the most part, these are fairly inexpensive items. Even looking at the history results on eMovieposter, they never have ventured tremendously high - even for some titles that I would think would command more demand. I particularly like Mexican, country of origin films, as opposed to Mexican cards of USA films. Though, there's plenty appeal about the artwork in all of the cards. Perhaps a lot of the Mexican films never being released in English or stateside has a lot to do with keeping the popularity down. Which is a shame, because Mexican cinema in general is amazing - from horror to noir to the melodramatic and rumbera films.