The Houdini shops are complete crap. They sold me my first trick years ago (the UFO floating card), it was a little more on the difficult side so I gave up. Luckily I finally got back into magic and started with some easier self working stuff. I went back to one recently (a different one from the first one) and they were pushing the same *** trick. A lady asked what would be good for her ten year old son and they pushed the trick on her as well. I advised her not to buy it. I was really upset that a store with Houdini's name on it would have such a bad selection of tricks.
Definitely check out Denny's & Lee's Shop and also make sure to see Mac King's show (1pm & 3pm at Harrah's). Stay away from World's Greatest Magic Show, just saw it a few weeks ago and it was pretty bad.