Don't be anal about your cards. Let them get dirty and beat up, then wipe them on your pants and keep going.
You should be able to do your work with any deck that is handed to you. It may not be the best your Pass will ever look, but it should be good enough.
The only guys who don't like to use a nicely worked-in deck are the poor Joes who've built their reps on opening a sealed deck of cards with every performance. Because the cards are so stiff and slippery, they're limited in what they can do. It's hard to work in a relaxed and artless way if doing difficult sleight of hand when a deck is stiff and very slippery.
I always have half a dozen decks in various stages of being worked in. And I also keep some really beat-to-hell decks around for practice as well. The only thing I avoid practicing with is a new deck, but I can afford that luxury as a non-pro.