Reptile shows are a great place to check out some amazing animals.. and they are also a great place to expose yourself and your reptiles to various diseases that can range from causing your reptile to get sick or death.
If you purchase from a show I would buy from a breeder that practices strict quarantine procedures at the show and doesn't allow anyone and everyone to handle and pickup their dragons. You are asking for trouble.
Rob & Vicky Dachiu have one of the best setup displays for showing off their dragons and not letting people come in contact with their dragons.. this minimizes the spread of diseases to both their collection and yours if you buy their animals.
Not trying to be dramatic, it's just the sad truth now a days. Buy from someone that practices good quarantine and you will minimize your risk. Any new reptile should be quarantined before exposing to your collection regardless of where you buy.
Shows are a lot of fun. wash your hands often and don't touch a lot of reptiles before picking out the dragon that you are happy with.
Goodluck and have fun,
brandon
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Dragons by Nature