His site is like perusing a "poster museum," in many ways. And he has an amazing collection and his site is truly a great database, because he even keeps those images of posters online, that are not available to buy or have been sold.
I've spoken to him only a couple times. He was very nice, helpful and polite. I speak no Spanish and his English is limited, but we had good conversations, nevertheless.
He has gathered his collection from many associations and contacts, that go back many years, too, in some cases.
(And many of his prices, both on his site and on the bay, are thru the moon. No doubt about that.
)
If there were 2 things he could be a bit "more on top of," it would be: the release year of some of his posters. He doesn't specify if a poster is a later RR or not, (he will indicate just the year the film was released) and that can be confusing, if one doesn't know). And some of his pics are not the best (slightly out of focus or the colors aren't quite true). When asking major coin$ for a poster, a good, clear photo (or photos) is so important, imo.