Honestly, I don't buy the whole "its better to buy online then it is in person at a show" thing. Is it really that you are concerned with the stress the snake goes through at the show, or is it maybe more of a shameless plug for your own online business?
There are good guys and there are bad guys. The good guys I am buying from at the show know how to take care of their snakes. They are not going to expose the snakes to 65 degree temperatures at night just because they are on the road.
Sure, the show is probably stressfull for the snake, but at least during the entire trip it is being cared for by someone who knows what they are doing. Safe to say that I trust a reputable breeder a little more then the mail man!
Now don't get me wrong, there is NOTHING wrong with buying online from a reputable breeder...