There are some random things I've always been curious about!
1. How do you transport animals to shows?
I only do local shows so no overnight stays are needed. If a venue does not have heat/ac I also wont do the show. Most venders will transport them in their displays to save on space whether they are using deli cups or a 3 tier system.
2. What happens to snakes that don't sell?
Babies that aren't sold, become juveniles that are for sale. Juveniles become sub-adults and the price gets raised. If still unsold they become unproven adults and the price gets raised again. If it still doesn't sell it might get bred and now sold as a proven breeder and again higher price. Animals can also be used to barter or trade for other projects. Sometimes a breeder that doesn't want to take the animal home will wholesale it to a retailer/flipper.
3. How do you avoid having your snakes pick up mites/other infections from reptile expos?
You do have to be a little selective on who gets to handle an animal. An easy way to decline someone is to just say "not right now, the animal has been handled a lot and I don't want to stress it out". I typically take an adult snake that is not for sale with me for people to handle. Before returning the animal to it's enclosure at home it gets wiped down with reptile spray. Some local shows I wont do because they are known for not being clean.