I know this is stating the obvious but it depends on which tricks from the book you want to do.
Most of the card tricks are impromptu and the necessary component for those that aren't can be had at staples for next to nothing.
The coin tricks tend to be more gaff intensive using all sorts of items from extra coins of a contrasting color to droppers, handkerchiefs, wands, specific types of soft coins that can be found at rare coin dealers and, of course, the well known gaffs to match any coins.
Also there's a trick that requires you customize the printing of your business cards which was always too much of an investment for me to try. He's got the cigar routine which requires wooden cigars and a specifically sized purse. And, then there's a couple of rubber band tricks that require, obviously, rubber bands but he was pretty specific about which type and size.
I mostly stuck with the card tricks, and worked out the puzzles. The puzzles were a lot of fun.
Dave