It depends where you are. You can't buy one in the UK - as The European Grass Snake (Natrix natrix) is protected under UK conservation laws. It's illegal to take them from the wild - and there are...
Currently, the Orlando Science Center costs $17.00 for Adults (13+), $12.00 for children (3-11), $16.00 for Students and Seniors (55+) with a valid ID.
Orlando Vacation packages cost from $50 a night to $5000 dollars a night depending on whether you want to sleep in a hotel or not. Additionally, car rental is included.