I'll echo the recommendations from others, especially RealityOne.
The Packet Killer DVD (comes with a full deck of the required gaffs) is probably the best starting point, and comes with some terrific classics.
The Ultimate Marked Deck is very expensive nowadays. If you want a printed deck instead I'd recommend Penguin's Marked Cards, which are on Maiden Backs, are easier to read, cost only $10, and come with video tutorials.
For good resources about marking your own deck, some of the best books are Pete McCabe's book PM Card Mark System (2010), and Kirk Charles' book Marked for Life (2002), or the updated version Hidden in Plain Sight (2005) which adds a chapter by Boris Wild
Nick Trost is a guru on packet tricks. I highly recommend his book The Card Magic of Nick Trost, and his many packet tricks. Eight Card Brainwave is a classic, but he's also produced some fun novelty packet tricks like The Unknown Card, Bigfoot, and many others.