I have to agree with what Jackson Robinson stated on your project preview page. The back design is solid but you should work on doing something a little more with the faces. Perhaps tweak the pips a little - not radically, but in a way that suits the foliage theme while remaining true to the original suit designs. Bump up the courts a little bit, perhaps - make their design more in line with the theme as well while still remaining true to the original.
It looks like you're trying to make this as a magician's deck, with minimal changes to the faces - and that's fine. But in this market, it's a much harder sell to do limited-edition decks as magician's tools when they're just that: limited editions, in short supply, only to be made one time. Imagine how few magic decks would continue to exist in the Bicycle Rider Back design if USPC announced they were only making one more print run of them and they'd never come back to the market again...
Simply put, a limited-edition deck is best targeted to an audience that eats up limited editions, and that's the collector audience. They prefer just a few more bells and whistles in their designs. It's been a long time since a minimally-custom deck was a big hit with collectors because there's been so many more fully-custom decks made in the past several years.
Of course, you could specifically market your deck to magicians, but I think you're really limiting yourself if you do. There's a fair number of magicians out there, but unless you sell to quite a large number of them, you're less likely to succeed. Jazz up the design just a little bit more and I think you'll have at least a modest hit on your hands. The basic concept is solid, it just needs a little more to get it to be more popular.