Not too long ago I was researching the possibility of independently publishing a deck (not mine, someone else's), and I decided not to, mainly because of what you have to go through to get a deck distributed through distributors.
This is what I remember from my research at the time, and I may not have correctly understood it, and I didn't end up doing it so perhaps there are nuances I didn't grasp, but here's how I understand it: when you place your deck or book with a distributor, the deck, so to speak, is stacked against you. You must pay to ship the deck to the distributor. Then, the distributor only pays you for product which they put into bookstores and which the bookstores sell. So, if the bookstores don't sell the decks and return them to the distributor, the distributor returns them to you, and you make no money, in fact you lose money because you've paid to ship them to the distributor. And it's even worse with decks than with books, because decks have more of a potential to get ruined on the shelves. The returns you get will have sat around on the bookstores' shelves for many months, getting beat up, torn open, etc., so once you get them returned, you may not be able to sell them again, so that's more money out of your pocket.
There is a distributor, if I recall correctly its name is New Leaf or something like that, which specializes in New Age products like decks. But their terms were particularly draconian. The distributors seem to have everything arranged so that they bear none of the risk and the publisher bears all the risk. It was this that led me to abandon my publishing plans.
I second Nevada34's suggestion that anyone interested in self-publishing should go and buy a book about it (there are several available on Amazon) and see what's involved before going any further.
-- Lee