You can normally get supplies (feeders) alot cheaper than you would anywhere else. You are able to talk to a variety of breeders, and see a variety of reptiles. It depends on what you are looking for..but most often common reptiles are cheap or decent priced.
Shipping for reptiles runs about $55-$75, so for some people the shows are cheaper way to go. You can also view the animal in person, rather than buying online going with a picture.
Personally, if you are planning to go..I would wait till midsummer/summer and make it worth the drive. Righ now most reptiles are not being bred, most breeders are trying to sale their leftover 2011's. Again though, it depends on what you are wanting.