Hi, you should have lots of fun tomorrow at the show. The White Plains show is supposed to be a great show, I've never been as it is about 6 hours away from us. It can be challenging when you don't know anyone at the show and don't have an experienced herper to take with you.
Some things you should look for are:
1. Check the snake that you want to buy for tiny bugs. They look like tiny black spots. After you handle a snake, check your hands for these, also. These are called mites and are a pain to get rid of. If you should find any on a snake, I would advise NOT buying any snakes from that person. And by the same token, if any of the animals on the table look sick or otherwise affected, I would take my business to another table.
2. Find out if the person selling the snake is the breeder or if they bought it from someone else to resell it. I prefer to buy directly from the breeders, although there are good broker/resellers out there. You want to find out the birthdate of the snake, what he/she is eating (frozen/thawed, live, fresh killed mice), when they last ate, how often they eat, etc. If this is your first snake, I would try to get snake who is an established mouse feeder. Save the snakes who only eat scented pinkies or anoles for someone who has experience. You also should find out whether it is a male or female. You might want to ask the seller to sex the snake in front of you, just to make sure the labels didn't get mixed up. Nothing worse than raising a female to maturity and finding out it is actually a male when you are planning on breeding it, or vice versa. Find out what morph (color/pattern) the snake is. Sometimes hatchling and juvenile corns don't look like the adult they will become.
3. Is the seller willing to answer your questions? I know that some people are just window shopping and will ask lots of questions and have no intention of buying, but a seller should be willing to spend some time with you, answering questions. If the seller blows you off or otherwise acts like "show me the money" before he will talk with you, I would go to another table. Most sellers at shows are really good at talking with the potential buyers, so don't expect this type of seller, just be prepared. I have only encountered one seller like this in over 4 years of shows, though.
4. Explain that you are a first time snake owner and see if they have any tips for you. I hope that you have already bought and read "The Corn Snake Manual" by Bill & Kathy Love. If not, buy a copy at the show from the bookseller.
5. You should be able to find tons of baby snakes at the show this time of year. The cornsnakes are all hatching out, so be prepared for a hard decision in choosing just one.
6. If possible, you might want to ask if you can handle the snake you are interested in purchasing. Some breeders won't let you, though. You need to decide if you are willing to buy a snake that has not been held by you. BE AWARE THAT HATCHLING SNAKES ARE VERY FAST! If you have never held one before, ask the seller to show you how to do it before you handle it. Be ready to disinfect your hands with the seller's disinfectant (or better yet, bring your own waterless hand disinfectant). If the seller has his own disinfectant that he insists that anyone use who is handling his snakes, this is also a good sign. If you are messing around with any of the mice or chicks or baby rabbits at the show, I would definitely wash my hands very well with soap and water in the bathroom before going around any snakes!
7. If the snake you are interested in looks unhealthy or defective, don't buy it obviously! Look it over very carefully, check out its mouth (I don't look inside, but some people do) and check out its vent for any discharges.
Good luck and let us know what kind of snake you get.
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sue