I was looking for like 20 decks because im having a card tournament. The good set of decks are like 5 dollars. Im not going to buy 100 dollars worth of cards.
One of the casinos will definitely cut you a deal, if not give them away, since you would essentially be giving them free advertising at their event. Contact one of the floor hosts and tell him/her what you're looking for and I'll bet they'd be glad to help you out.